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Swine Flu - Symptoms and Aid

مرسلة بواسطة gfjghjghghj Friday, 19 June 2009 0 التعليقات


In a world where a global economy is a given, where worldwide travel is routine, and borders are increasingly less defined, the recipe for a global pandemic is just right. All that is needed to bring humanity to its knees is the perfect disease. Historically, this "perfect disease" has been a particularly deadly version of the common flu. In 1918, a version of swine flu threatened to decimate humanity, killing somewhere between 50 and 100 million people, approximately one-third of our species. Today, fear of a similar global outbreak of swine flu is high; in order to sort everything out, here is a good introduction to the symptoms and possible aid of persons infected with swine flu.

As seen today, the dangerous variant of Influenza A Type-H1N1 swine flu is really not much different than any other flu that you may have had in the past. The big game changer is how our bodies react to the disease once it infects us: It is simply unable to deal with the symptoms. Our bodies generally have some resistance to the flu from infections that we have dealt with in the past or that our ancestors survived. This level of immunity helps our body to work against the symptoms that could kill us and helps fight off the flu. What results is a relatively mild flu that keeps us home sick for a few days. However, the H1N1 swine flu virus seen today is really a mix of swine, bird, and human influenza.

Swine flu is believed to be contracted through contact with an infected person. This type of influenza has been observed to readily spread from person to person. A person infected with H1N1 swine flu will not immediately notice any changes. Depending on the person's immune system, it could take 24 hours or more for him or her to start feeling the effects of the infection. These symptoms mirror the effects of the common flu, but are much more severe: body aches, headaches, fever, sore throats, coughing, chills, and fatigue are often present. Infected people with H1N1 flu are also highly likely to suffer from vomiting, diarrhea, and the associated dehydration. Although these effects are severe enough, the real killer comes from pulmonary edema, which is the filling of the lungs with fluid, which causes coughing. In the 1918 flu pandemic, victims literally drowned in their own body fluids. These symptoms take a toll on the body and can also aggravate existing conditions or allow new ones, such as tuberculosis or pneumonia, to take hold.

Luckily for us, it appears that swine flu may not be as deadly as originally believed. Modern medicine has played a key factor in the ability of most infected people in developed countries to make complete recoveries. Ensuring that an infected person is identified early and receives the proper care also seems to be important in ensuring survival. Anti-viral drugs such as Tamiflu and Relenza are currently highly effective at fighting off the H1N1 swine flu. It is also important to keep an infected person warm and well-hydrated, ensuring that they receive plenty of rest and are not stressed needlessly, as this helps his or her body to work against the infection and avoid complications such as dehydration. A full recovery is possible with proper treatment.

It is important for us to remember that we can take steps to prevent the spread of swine flu. Simple steps such as washing your hands and covering your mouth while coughing or sneezing do have a big effect on controlling the spread.

If you are experiencing flu-like symptoms, avoid situations in which you could infect others and consult a doctor. It is better to be safe than sorry. Looking out for the symptoms of swine flu and seeking aid when needed can help keep you healthy.

You can always get updates about this disease and read about it at GlobeMe, The first global blog.


I know I am not going to get the swine flu, bottom line. And I live in New York City and I am not even worried. Not even worried a bit. So the question is how to prevent the flu and block swine flu? Here is the answer.

It is such a trip as you see so many people here in New York wearing these surgical mask to prevent themselves from getting the swine flu and you know the swine=e flu is only the beginning. There are going to be so many other flu's out in the coming years. Why?

Why, because it is business. Whether you believe that or not it is true. It is business and it is big business at that. The more people who are sick the more people who have cancer the more people who have this disease and that disease the more people who have swine flu the more money the pharmaceutical companies make in the United States and around the World.

It is a trillion dollar business. Trillions of dollars World Wide, this is a huge, this is global. So here I am riding the subway, I am from New York City born and raised and lived in Europe for a while and lived on the West Coast of the United State for a while and been to many places in the world and let me tell you one thing.

We are all the same and that is so represented in New York City and it is unbelievable and yet believable the biggest outbreak of the swine flu is right here in New York City.

People are scared and people are dying and people are wearing masks and people are staying away from each other and this will happen in your town or city in your part of the world also because this is a fact, if it is happening here it will happen in your town also, in your part of the world whether you are in Spokane Washington or Mumbai India it just does not matter.

So it is kind of funny to me the whole thing. Not funny in the sense that people are actually dying and getting sick and that this thing is spreading and that this swine flu is real and growing and that there will be other out breaks of this flu strain or the next flu strain soon this summer early next year and that peoples families are devastated, non of that is funny to me, my heart really goes out to everyone.

What is funny to me is that I walk and hangout out amongst these people wearing the masks and coughing or sneezing next to me on the pack train subway car on the street in a park wherever and I don't even mind because I know I am safe. How to prevent the flu and block swine flu? I am not even worried about as I have taken these steps that I am sharing with you here.

I'm living my life and I know I will not and never get the Swine Flu because I am informed and studied and researched and I eat healthy and drink plenty of water and I make sure I take the right supplements to boost my immune system so that swine flu or any thing for that matter gets smacked once it enters my body by my cells which are happy dancing healthy fighters of toxic disease including swine flu.

That is the bottom line. I also found this product Baniflu after doing all the research to find out what is the best thing out there that I can take now or buy now and put on the shelf until I need to take it to totally protect myself from getting the swine flu on the next big flu and I found it. You can check it out at the link below.

That is it, period, and end of story as to how to prevent the flu and block swine flu. Don't go around worrying as worry will only deplete your immune system anyway, get prepared remain healthy and get yourself a flu blocker just in case and as I said I take and recommend Baniflu and I am in the center of this swine flu epidemic.

With this plan you and your family and your friends and kids, will be safe and you not only have a full proof plan but you also have a back up plan. You are 100 % percent covered right now starting today and there is no need to worry just go about your life as it was intended to be.

You need to be proactive and not wait until it is to late until you find yourself waiting on Tamiflu which you cannot get your hands on because there is no supply and it takes a prescription to get to you or you get it after you are sick, you need to just not get sick to prevent the flu and you can with Baniflu which you can get now and have ready at a moments notice and it is healthier and better than Tamiflu anyway.

It works for me, so go and check it out at the link below howtopreventflunow.com and answer the question to how to prevent the flu and block swine flu today, now and forever. Enjoy be happy love smile!

http://www.howtopreventflunow.com

Life it is so beautiful best wishes and all the best,
Eddysear



A sore throat is one of the initial symptoms of a virus, including swine flu. Accompanying symptoms like fever, chills, aches and pains, nasal discharge, coughing, sneezing, digestive upsets and malaise may also be present.

Conventional swine flu treatment includes a course of anti-virals like Tamiflu and a period of quarantine to limit the spread of the virus. There is also a lot you can do with natural swine flu treatments to relieve your sore throat, boost your immune system and fight the infection. Here's some of the most popular recommendations for natural swine flu treatments:

Vitamin C

High dose vitamin C can boost your white blood cell activity to help fight flu infections and relieve the pain of a sore throat.

At the onset of symptoms, take 1 gram of vitamin C hourly until you get loose stools. Dosing with vitamin C until you reach 'bowel tolerance' indicates that your tissues are saturated with vitamin C, and any excess is spilling over into the urine and stools. At this stage your immune system will be working optimally.

Garlic

Garlic is a powerful anti-viral food recommended as a natural swine flu treatment. You can eat it raw or grate it into teas, soups, stir fries or juices. Aim to consume at least 1 clove a day.

Anti-viral herbs

Anti-viral herbs can build protection and natural immunity to all types of flu. Olive leaf extract, astragalus and echinacea (which is particularly good for children) are good choices. These herbs can be taken as a tea or in liquid, capsule or tablet form.

Hydrogen peroxide

Inactivating pathogens with hydrogen peroxide has been used worldwide since the flu pandemic of 1918. For a sore throat it is good to use hydrogen peroxide mixed in warm water as a gargle. It can also be taken internally under your health professional's guidance.

Flu-buster tea

This always works to relieve a sore throat for the normal flu so it is a good bet that it will help as a natural swine flu treatment. Simply brew a teaspoon of grated ginger, a teaspoon of grated garlic and a pinch of cayenne pepper in a cup of hot, boiled water. Add the juice of half a lemon (and a teaspoon of honey if desired to sweeten). Sip slowly. Drink at least three times a day or as needed.

Chicken soup

Chicken soup is high in the amino acid cysteine which can thin mucous and help eliminate it from the body. Add some ginger, garlic, turmeric and cayenne to increase its healing properties.

NAC

N-acetyl cysteine (NAC) is an amino acid that has been shown to raise immunity to the flu in clinical trials. It is available as a capsule and should be taken at 600 mg twice daily.

Steam inhalation

Aromatherapy oils like tea tree, eucalyptus and thyme are excellent natural swine flu treatments to relieve a sore throat and congestion. Simply add a few drops of your chosen oil to a bowel of hot water. Cover your head with a towel and breathe the steam in deeply for a few minutes.

For those who follow a healthy lifestyle and use these natural swine flu treatments, the swine flu may have little or no effect on the body.

For further information on swine flu treatments please refer to the e-book Nature's Amazing Sore Throat Cures by qualified naturopath Elizabeth Noble. This program includes the use of vitamins, minerals, herbs, liver cleansing, essential oils and stress management to nip a sore throat in the bud and keep your natural immunity in tip top condition.

Article Source: http://EzineArticles.com/?expert=Elizabeth_Noble


The outbreak of the swine flu epidemic is now sending a wave of panic to all corners of the world. Starting from Mexico where it has claimed record number of lives, new cases have been confirmed in all the continents of the world prompting health professionals to insinuate that it will definitely develop into a pandemic.

But what exactly is swine flu? Swine flu or swine influenza is described as a highly contagious acute respiratory disease contacted from pigs. It is an air borne disease which spreads through tiny particles in the air or by direct contact. It is caused by a virus which normally infects pigs and it tends to kill one to four per cent of those infected. The worst part of it is that some infected animals may not display any symptoms at all, making it difficult to isolate and cull the infected ones.

As the name implies, swine flu normally infects pigs and is in most cases, transferred from pig to pig. However, it is quite unfortunate that the virus can transcend this species barrier and infect humans. In other words, the swine flu virus can develop into a form easily spread among humans by combining with a human flu virus as it can equally mutate on its own into a transmissible form. When this happens, it can spread quickly especially in this age of cheap flight and frequent trans border travels. A possible scenario is succinctly described by Meri thus:

Unfortunately it seems to be spreading...all it takes is one infected person to get on a plane out of Mexico...it spreads easily through contact with an infected person (ie: sneezing, coughing, shaking hands, etc). the same as any flu virus. One person on a plane infects 5 more...those 5 get off the plane and infect a further 25 people at JFK Airport in New York...those 25 get on different planes going to different parts of the world...each infecting another 5 people...now there are 125 people with swine flu traveling and infecting more people...it won't take long for it to become pandemic.

Symptoms:

Swine flu symptoms can hardly be differentiated from those of the seasonal flu or influenza. These may include fever, cough sore throat and body pains. According to the World Health Organization, the symptoms can also include acute pneumonia which can eventually lead to death. If anyone displays one or all of the above symptoms, please take the person to the hospital immediately for treatment.

Considering the above facts, coupled with the media hype surrounding the outbreak of the diseases and the scary comments of health professionals and political leaders, it is quite understandable why people are frightened worldwide. In fact the decision of the World Health Organization to raise the alert level to phase five of six, meaning a global outbreak is imminent, is enough to trigger worldwide panic. Instead of panicking, the best thing individuals can do is to be on guard and to do everything humanly possible to prevent themselves from contacting the virus. The following measures are recommended in this regard:

1- Do not travel to a locality where the outbreak of the disease has been reported. Do not travel outside such localities if you reside there.

2. If swine flu outbreak has been reported in your locality, avoid moving close to the infected persons and stay away from high risk areas. Try not to mix with people except it is absolutely necessary.

3. Under no circumstances should you move near live pigs except where impossible. Remember the virus is not contacted by eating pork products.

4. Young children, very old people and those with respiratory illness or compromised immune systems are most at risk. Therefore, special attention should be paid to them.

5. Always wash your hands thorougly after using any public facility, especially toilets and lavatories.

In conclusion, I wish to point it out that testing positive to swine flu does not amount to death sentence. It may be frightening and quite scary, the good news is "swine flu is treatable." Not only that, scientists have been working very hard to develop a vaccine against the virus that is responsible for the disease. Fortunately, a group British scientists has taken a giant step in this regard. They have succeeded in developing a strain of swine flu that is suitable for developing the vaccine. This is a good news, innit?



Can an employee be excluded from the workplace with or without a confirmed diagnosis of swine flu?

The first concern of every business should be for the health and safety of their employees and customers. There are two health and safety aspects which an employer needs to address within the workplace namely:

  • Keeping employees informed about the health risks; and
  • taking steps to ensure that there is good hygiene in the workplace and that working practices do not impose undue risks to employees.

Swine flu is thought to spread in the same way that seasonal flu spreads through coughing, sneezing or even coming into contact with someone who has or has recently had influenza. The World Health Organisation also recognises that Swine Flu appears to be highly contagious and as such their advice is to apply pandemic infection control procedures. It is deemed best practice to remain vigilant and ask employees to stay at home, report to HR and to consult their doctor if they report they are feeling unwell, have flu like symptoms or have travelled to Mexico or any other area considered high risk by the World Health Organisation.

If there is a confirmed diagnosis of swine flu in the workplace employers could also consider imposing home working or travel bans on employees until such time as they have been appropriately assessed medically. Therefore if a pandemic develops, it is likely that some employees will be required to work from home or to refrain from work for a period. However, unless such things are provided for in the employment contract, imposing these changes could constitute a unilateral variation, potentially giving rise to claims of constructive dismissal.

There are additional powers provided, albeit generally to local authorities, under The Public Health (Control of Disease) Act 1984 (Public Health Act). In essence what this act enables authorities to do is:

  • Seek orders that a person be medically examined or be removed to, or detained in, hospital; and
  • request that a person does not attend work.

However the above is all subject to the employer complying with relevant laws in relation to discrimination in the workplace on the basis of disability, sex, marital status, race, ethnic or national origin, religion or belief and sexual orientation.

In conclusion, employers have a duty to provide a safe place of work for all its employees. Consequently, an employer would be justified in the circumstances to ask such an employee to work from home for a period of time and to seek medical advice following a return from Mexico. Once the employee is given the medical all clear, they should then be allowed to return to work.

How could swine flu impact on wages?

In the event an employee is sent home, the issue of money is likely to be a big concern for both the employer and the employee. The employer will want to know whether they have a duty to pay the employee and the employee will want to know if they will be paid. This will depend on the circumstances of each individual case, but the first point of reference will always be the employee's contract of employment.

As a result of the recent press regarding Swine Flu, companies are being advised to put a contingency plan in place in case of a pandemic. This document, a health and safety internal procedure or handbook may state the company's position about the situation including whether wages will be paid and how much the employer will pay.

If an employee is suspected of swine flu, or has been in contact with someone who has been diagnosed with swine flu, it may be wise to send the employee home. The employer has an obligation to provide a duty of care to its workforce as a whole. However, the employer also has a duty to provide work, therefore, if the employee is ready and willing to work but sent home as a precaution, the employer should consider keeping the employee on full pay and isolated from other employees. This is until they are assessed by a GP and cleared of the swine flu. By taking such steps the employer would achieve a balance of complying with both duties.

If an employee has been diagnosed with swine flu, it is more than likely the side effects will place the employee in a position that they are unable to work. The employee will then be entitled to Statutory Sick Pay or sick pay in accordance with the company policy. Even if the employee is able to work, they should be told to stay at home until a GP has declared that they are no longer a risk to other employees. By doing this, the employer has taken steps to ensure its employees are protected. In the situation of a confirmed diagnosis, the fact that swine flu has the potential to cause fatalities, the employer's duty of care and its health and safety obligation is paramount.

As in most employment situations, this is the basic position. However, each case would be assessed on its own merits.

What duty does an employee have to his employer?

Contrary to what employees may believe, if they fail to protect themselves by reducing or minimizing the risk of catching or spreading swine flu, they may be in breach of the implied duties imposed on them under their contract of employment.

Even though employees may have a large pile of work on their desks, they need to seriously think about the consequences of going into work whilst they feel unwell. A common sense approach needs to be adopted and if they feel unwell, they should stay at home until they feel better in order to avoid the risk of spreading the flu to other members of staff, putting their employer at risk of having a very ill workforce.

Employees need to balance the duty they have to act in the best interests of their employer, against the duty they have to serve their employer. Some employees may be tempted to jump onto the potential pandemic bandwagon in order to use the excuse and take time off from work. However, doing this could leave them in breach of their implied duty.

So what actions can employees take in order to comply with all implied duties under the contract?

  • If you feel ill, stay at home until you feel better - regardless of the urgent work that may be on your desk.
  • Keep your employer updated in respect of your illness.
  • Prevent the spread to others - keep your distance from colleagues and other people, especially children.
  • Do everything you can to ensure a speedy recovery such as, taking regular medicines to relieve the symptoms such as paracetamol and asprin, drinking plenty of fluids, maintaining a good level of basic hygiene.

What duty does an employer have to the wider workforce to protect them from infection?

There are a number of measures that employers will be considering to stop the spread of the illness to its work force. One such recommendation has been to conduct a risk assessment, whereby the employer considers a range of social, environmental and organisational measures that could be taken. Employers would be wise to make sure that healthy workers reduce or avoid contact with individuals (whether colleagues or clients) who may be showing symptoms of the illness. Social distancing is considered a priority, for example by:

  • Creating an atmosphere where it is acceptable to take time off sick, and not to return to work until symptoms have completely gone; or
  • encouraging workers to work from home; or
  • promoting communication through conference calls, or other telecommunication instead of face to face meetings.

Employers should also raise awareness about the need for workers to take responsibility for their own health, by promoting individual respiratory hygiene, and ensuring that adequate access to hand washing facilities exists.

Can someone stay away to avoid the risk of infection?

The million-dollar question for employers is whether there is a genuine need for an employee to stay away from the office i.e. are they at such a risk of being infected that they must stay away?

Historically employers have placed a high level of emphasis on and encouraged a culture of tolerance and the struggle to attend work even when you are not physically fit. In the modern world this effectively amounts to being a breach of an implied term of the employer's duty to take reasonable care of its employees' safety and working conditions. Hence the attitude to attend work irrespective of health must change.

When examining this issue the employer must assess whether there is a genuine belief that the employee will contract the infection. Questions to determine why and how they could contract the infection must be asked to establish this. Employee fear cannot be taken into account.

Current governmental guidance is that employees should attend work as normal unless there is a risk imposed in that workplace. However, this advice may change, so employers must pay close attention to the statutory and contractual rights employees have in relation to sickness.

At the moment when employees consider whether they are within their rights to stay away to avoid the risk of infection, effectively the answer is 'no'.

Could I claim if I catch flu at work as a result of my employer not protecting me? What would I do to prove it was work related?

Employers should ensure that they adhere to government guidelines in respect of protecting against swine flu as well as updating their own policies to ensure that anyone affected by the virus stays away from the workplace to prevent the virus being passed on to others.

An employer owes its employees a duty of care and by not having adequate controls in place it could be argued that they have acted negligently and are in breach of this duty of care. This could give rise to potential claims from employees who may have contracted the virus at work, through contact with other colleagues or clients that have had the illness.

Employers should also ensure that they have adequate employee liability insurance in place to cover themselves in the event of such a claim.

What is the position of employees who have high contact with the public (either inside or outside health services)?

The government has advised that employees with regular public contact should carry out their duties as normal. However, employers whose staff have high contact with the public would be advised to carry out a risk assessment and issue its staff with face masks where needed.

Employers who work for the health services should take particular care in relation to swine flu. They should report to their line manager if they have had contact with someone who has been diagnosed with swine flu or have flu like symptoms themselves. Employees who have been diagnosed with swine flu should usually stay away from work until all the symptoms have been gone and they have been signed fit for work by their GP. However, employees may be able to come back to work early in order to work within a sanctioned off area for patients with swine flu, in this scenario they should ensure that they remain in the sanctioned off area at all times, including during rest breaks unless there is a particular risk of infection in their workplace.

If you need further legal advice on any of the issues raised above freephone: 0808 129 3320.

Jacqui Parker
Partner
Employment Law Team
Simpson Millar LLP Solicitors

Flu Viruses

مرسلة بواسطة gfjghjghghj 0 التعليقات


TABLE OF CONTENT

Viruses
Avian Flu
Swine Flu
Virus characteristics and heat instability
About Viruses
Single-Minded Mission
How to destroy Viruses

Viruses

Many of us are naturally concerned by the alarming spread of viruses in recent years; the bird flu virus was a huge threat to Europe and most parts of the world. The H5N1 bird flu virus was fist shown to have passed from birds to humans in 1997. Even more recently, swine flu is increasingly becoming a huge threat with its ability to mutate and change form. The first case of swine flu was reported in Mexico; however, it has since spread to over 66 countries with over 203 confirmed cases reported in Britain. The very young, the elderly and those with weakened immune systems are particularly at risk from these viruses.

Avian Flu

For more than a century, bird flu has circulated among birds, particularly domesticated fowl, but the new subtype A (H5N1) first appeared in 1997, the strain which can infect humans. The virus has strengthened and mutated, resulting in a contagion that can move from bird to human- but not yet from human to human. There is concern that if the virus infects someone who is already infected with a human flu virus, then a new highly virulent strain could result, that can be transmitted human to human.

Human cases of bird flu have caused infections and death across the globe as scientists struggle to identify the dangerous strains and prevent a fatal pandemic. About 20 million birds have been slaughtered in an attempt to stop the spread of the virus, which spreads by air, water, and soil. So far the virus can be caught only by people who are working with infected fowl, or in contact with infected rivers, poultry processing plants, etc. About 100 cases of the disease have been reported, resulting in about 50 deaths.

The symptoms range from fever, cough, sore throat, and muscle aches to eye infections (conjunctivitis), pneumonia, acute respiratory distress, viral pneumonia, and other severe and life-threatening complications.

Most health experts researching and fighting the incidence of human bird flu do not have an optimistic outlook. It is especially dangerous to humans as our immune system does not have the antibodies to handle something that used to be relegated to animals.

So far, doctors have been ineffective at treating the resultant respiratory infection, which can lead to fatalities as it takes hold with unprecedented force, settles in the lungs, and resists anti-viral and anti-bacterial medication.

Swine Flu

First detected in Mexico , Novel influenza A (H1N1) is a new flu virus of swine origin. The H1N1 strain is the same strain which causes seasonal outbreaks of flu in humans; however, the swine flu H1N1 strain is different as it contains genetic materials typically found in strains of virus, which affect birds, swine and humans. When flu viruses come into close contact with the same host, they have the ability to swap genetic components with each other. The virus is thought to spread through coughs and sneezes of people who have been infected.

In humans, swine flu symptoms are similar to those manifested for seasonal flu, i.e., sudden onset of fever, cough, sore throat, shortness of breath, headache, tiredness, aching muscles, chills, sneezing, runny nose and loss of appetite. Buy an Air Purifier Proven and Tested to destroy Viruses.

It is now expected that a swine flu pandemic is likely to strike the UK in September or October as the virus is gathering strength as it spreads. The World Health Organisation is preparing to declare a swine flu pandemic and the world is in phase 5 of WHO's pandemic alert scale with 6 being the highest. Phase 5 of the pandemic alert scale "is characterized by human-to-human spread of a virus into at least two countries in on WHO region. The declaration of Phase 5 is a strong signal that a pandemic is imminent and that the time to finalise the organisation, commincation, and implementation of the planned mitigation measures is short" (W.H.O). According to the W.H.O, 74 countries have reported 27, 737 cases of swine flu, and 141 deaths since its outbreak in April 2009.

The treatment of swine flu mainly involves antiviral drugs and antibiotics to treat any complications which may arise. A number of air purifiers can also be used for preventative measures; these have been tested and found to be effective in denaturing the proteins which make viruses active.

Virus characteristics and heat instability

Viruses aren't considered living organisms, but they are very dependent on living cells to replicate. The structure of the virus includes the envelope which is constituted by proteins and the genetic material which can be DNA or RNA. All these components are thermosensible. The genetic material and the proteins have complex structures that are involved in their function and the change of their arrangements may result in lost of function. This process is called denaturation. There are two basic ways to do that: changing pH and temperature.

The avian virus, H5N1, is a negative-sense, single-stranded RNA virus 5 , which has two types of proteins in its surface: hemagglutinin (HA) and neuraminidase (NA) 6 . It is known from the literature that the virus can be inactivated by 56 o C in 3 hours and 60 o C in 30 minutes 1 . Thus, only four degrees of temperature elevation reduced the time of inactivation exposure about 85%.

About Viruses

What They Are
A virus is basically a tiny bundle of genetic material-either DNA or RNA-carried in a shell called the viral coat, or capsid, which is made up of bits of protein called capsomeres. Some viruses have an additional layer around this coat called an envelope. That's basically all there is to viruses. Viruses are strange things that straddle the fence between living and non-living. On the one hand, if they're floating around in the air or sitting on a doorknob, they're inert. They're about as alive as a rock. But if they come into contact with a suitable plant, animal or bacterial cell, they spring into action. They infect and take over the cell like pirates hijacking a ship.

What They Look Like
There are thousands of different viruses that come in a variety of shapes. Many are polyhedral, or multi-sided, a bit like a cut gem. Other viruses are shaped like spiky ovals or bricks with rounded corners. Some are like skinny sticks while others look like bits of looped string. Some are more complex and shaped like little lunar landing pods.

Where They're Found
Viruses are found on or in just about every material and environment on Earth from soil to water to air. They're basically found anywhere there are cells to infect. Viruses have evolved to infect every form of life, from animal to plant and from fungi to bacteria. However, viruses tend to be somewhat picky about what type of cells they infect. Plant viruses are not equipped to infect animal cells, for example, though a certain plant virus could infect a number of related plants. Sometimes, a virus may infect one creature and do no harm, but cause havoc when it gets into a different but closely enough related creature. For example, the Hantavirus is carried by deer mice without much noticeable effect on the rodents. But if Hantavirus gets into a person, it causes a dramatic and frequently deadly disease marked by excessive bleeding.

Single-Minded Mission

Viruses exist for one purpose only: to reproduce. To do that, they have to take over the reproductive machinery of suitable host cells.

Upon landing on an appropriate host cell, a virus gets its genetic material inside the cell either by tricking the host cell to pull it inside, like it would a nutrient molecule, or by fusing its viral coat with the host cell wall or membrane and releasing its genes inside. Some viruses inject their genes into the host cell, leaving their empty viral coats sitting outside.

If a virus is a DNA virus, its genetic material then inserts itself into the host cell's DNA. If the virus is an RNA virus, it must first turn its RNA into DNA using the host cell's machinery before inserting into the host DNA. The viral genes are then copied many, many times, using the machinery the host cell would normally use to reproduce its own DNA. The virus uses the host cell's enzymes to build new viral capsids and other viral proteins. The new viral genes and proteins then come together and assemble into whole new viruses. The new viruses are either released from the host cell without destroying the cell or eventually build up to a large enough number that they burst the host cell like an overfilled water balloon.

How to destroy Viruses

Viruses aren't considered living organisms, but they are very dependent on living cells to replicate. The structure of the virus includes the envelope which is constituted by proteins and the genetic material which can be DNA or RNA. All these components are thermosensible. The genetic material and the proteins have complex structures that are involved in their function and the change of their arrangements may result in lost of function. This process is called denaturation. There are two basic ways to do that: changing pH and temperature.

The avian virus, H5N1, is a negative-sense, single-stranded RNA virus 5 , which has two types of proteins in its surface: hemagglutinin (HA) and neuraminidase (NA) 6 . It is known from the literature that the virus can be inactivated by 56 o C in 3 hours and 60 o C in 30 minutes 1 . Thus, only four degrees of temperature elevation reduced the time of inactivation exposure about 85%.

The swine flu H1N1 virus is a new strain of the H1N1 virus subtype of influenza A. All influenza A viruses contain hemagglutinin and neuraminidase, although the structure of these proteins differ from strain to strain due to rapid genetic mutation in the viral genome. Influenza A virus strains are assigned an H number and an N number based on which forms of these two proteins the strain contains. There are 16 H and 9 N subtypes known in birds, but only H 1, 2 and 3, and N 1 and 2 are commonly found in humans.


Everything you want to know about Swine flu

مرسلة بواسطة gfjghjghghj Monday, 11 May 2009 0 التعليقات

As the world focused on the bird flu that killed hundreds of people in Asia, another bird flu strain infected pigs. It mixed with two kinds of flu from swine and a fourth kind that came from people. The resulting concoction spread among pigs, then recently started infecting humans. Scientists say they are unable to predict what this new swine flu will do next.

Since late March, it has sickened hundreds of people in 30 U.S. states and nations across the globe, including Canada and Mexico, where there have been 19 confirmed deaths.

"It's impossible to say with any assurance what's going to happen," said Dr. Christopher Olsen, a molecular virologist who studies swine flu at the University of Wisconsin's School of Veterinary Medicine. "Influenza viruses can evolve quite quickly."

Inspecting the virus itself is of little help, because scientists have yet to identify which features help it spread or kill, said Dr. Scott Layne, an epidemiologist at the University of California at Los Angeles' School of Public Health.

"The microscope doesn't tell you anything," Layne said. "What are the genetic correlates of virulence? Unknown. Transmissability? Unknown."

Among threats to public health, influenza poses an unusual challenge. People, pigs, birds and horses have developed unique strains of flu, which can easily mix and match into new strains that the human immune system is ill-equipped to recognize.

Flu research has accelerated since the Asian bird flu spread to humans in 1997. But the more scientists study flu, the more questions they have.

"I know less about influenza today than I did 10 years ago," said Michael Osterholm, director of the Center for Infectious Disease Research and Policy at the University of Minnesota.

So what should people worry about? History and ongoing research hold the key.

Why it mutates

The eight genes that make up all Type A flu viruses - the most dangerous kind - consist of RNA, not DNA, so they don't copy themselves reliably and are prone to mutation.

How it attacks

The virus' outer shell is studded with the protein hemagglutinin (H) that allows flu particles to attach to respiratory tract cells. The virus takes over the host cell and makes copies. Those flu particles use the protein neuraminidase (N) to break off to find new targets.

As the H and N change shape, the immune system fails to recognize them, and an infection can result. If two or more viruses - even from two species - infect the same host at the same time, they create a novel strain of flu. The name (H1N1) The combination of H and N proteins gives a flu strain its name. This swine flu is an H1N1 variety, the same label as the 1918 strain. This strain, though, is a new variation of an H1N1 virus. How easily does it spread?

Scientists are now getting their hands on samples of this strain and using it to infect laboratory animals. Researchers will see whether direct contact is needed for transmission and whether small flu droplets can spread easily from cage to cage. That will provide clues about how easily the virus spreads and how deadly it is.

Why Mexico?

Perhaps the genetic code of the Mexican version is slightly different, said Dr. Christopher Olsen, a molecular virologist who studies swine flu. "It can take as little as a single amino acid change to have a substantial difference in pathogenicity." Mexicans may have had longer exposure and may be more vulnerable to secondary infections.

How serious is it?

Dr. Peter Palese, a leading flu researcher at New York's Mount Sinai Medical School, said the new virus appears to be similar enough to other common flu strains that "we probably all have some type of immunity. There is no real reason to believe this is a more serious strain."

How common is it?

It may not be rare. A 2007 study compared swine flu exposure in farmers, their spouses and a control group. Compared with the controls, the farmers were 55 times more likely to have swine flu antibodies - a sign that their immune systems had tangled with the virus - and the spouses were 28 times more likely. The history The Spanish flu infected up to 40 percent of the world's population and killed more than 50 million. Swine flu was the first culprit, but scientists now blame a bird flu strain.

The bad news

Compared to the seasonal flu, the 1918 pandemic killed a disproportionate number of people ages 20 to 40. "The mortalities occurred in healthy people in their 20s, which is what we're seeing in Mexico," said Barry Bloom, a professor at Harvard School of Public Health. "That's a bit of a worry."

The good news

The movement of troops and refugees in WWI created a unique breeding ground for the virus. New research suggests that most deaths were caused by bacterial infections in weakened respiratory systems. If today's flu did reach such magnitude, antibiotics would save many of the infected.

The history

Swine flu was identified when about 200 soldiers at Fort Dix, N.J., got sick and one died. Genetic strands showed that it was similar to the 1918 virus.

The lesson

President Gerald Ford authorized a mass inoculation program, and almost 25 percent of the population were vaccinated. Guillain-Barre syndrome, which causes the immune system to attack the body's nerves, began appearing in patients who had received the flu shots. About 500 cases were linked to the vaccine; 32 died. But there was no swine flu epidemic, just a handful of cases.

Sources: The Washington Post; Los Angeles Times; Bloomberg News; U.S. Centers for Disease Control and Prevention; Centers for Infectious Disease Research & Policy, University of Minnesota; The Associated Press











What is swine flu and where has it come from?

Swine flu is a respiratory infection caused by influenza type A. It usually affects pigs, but can be passed to humans. This is a new strain, probably created when two older swine flu viruses infected the same pig in Mexico. These then swapped genes to create a fresh strain


Do facemasks protect against infection?

Possibly, but the evidence is disputed. An Australian study found they can reduce the chances of infection, but only if worn properly and continuously. The Government has stockpiled 350 million masks for NHS staff, but there are no plans to distribute any to the general population


What are the symptoms?

Symptoms of swine flu are similar to those produced by standard, seasonal flu. These include fever, cough, sore throat, body aches, headache, chills and fatigue. Some people also have diarrhoea and vomiting


How do I know if I should see a doctor?

If you develop the symptoms above, and you live in places where swine flu cases have been confirmed or you recently travelled to Mexico, you should seek medical advice. Patients are being asked not to go into doctors’ surgeries to minimise the risk of spreading the disease to others. Instead, they should stay at home and call their healthcare provider for advice


Is it treatable?

Yes, with the flu drugs Tamiflu or Relenza, but not with two older flu medications


Is there a vaccine?

No. Now the strain has been isolated, it will take three to six months to produce one


How well prepared is the UK?

As well as it can be. The Government has bought 33 million courses of Tamiflu — the frontline antiviral drug — which is enough to cover half the population. Arrangements are also in place to buy a pandemic vaccine as soon as it is available. The World Health Organisation judges Britain and France as the best-prepared nations


Why has swine flu killed people in Mexico while causing only mild cases in the US?

Scientists do not know yet for certain, but the likeliest answer is that we have yet to discover the full extent of either outbreak. The virus has probably been circulating in Mexico for several weeks, but went undetected because it usually causes only mild symptoms — there may well have been hundreds of mild cases for every death that has occurred. The Mexican outbreak may simply be more advanced than the one in the US


Does that mean we can expect to see deaths in the US and elsewhere too?

Possibly. There will probably be more severe cases, but many of those who have died in Mexico were not treated promptly. The medical response will be swifter and more effective in countries like the US and Britain, and that will certainly save lives


How do I protect myself?

Take common sense precautions. Cover coughs and sneezes with a tissue that you throw away. Wash hands frequently. Adults should stay at home if sick, while children should be kept home from school

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Do masks protect against Swine flu?

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Missed out on Matthew Williamson for H&M? Never mind. It's over anyway. Hot from Mexico - and now in every other town worldwide - surgical masks are this week's latest fashion accessory. At least, that's the verdict from politicians and most of the medical establishment, who think they're about as much use in avoiding swine flu as wearing a pair of statement earrings.

"The scientific evidence does not support the general wearing of face masks by those who are not ill while going about their daily business," says Alan Johnson, secretary of state for health.

Dr John McConnell, editor of the Lancet Infectious Diseases, agrees. "Masks are probably more useful for people with symptoms to prevent them spreading infection," he says. "In any case, masks need to be changed daily to be effective."

One dissenting voice is Andrew Easton, professor of virology at the University of Warwick, who argues that the correct mask can potentially reduce risk. The key word here is correct. "Most paper masks are worse than useless," says Dr Ron Cutler, deputy director of biomedical sciences at Queen Mary, University of London. "To be effective, they need to conform to CDC (Centre for Disease Control) standards. The best ones are sculpted to the face and are expensive, but even then they are of limited value. The virus is transmitted on water-born droplets from coughs and sneezes, and while the mask may prevent you getting infected from direct contact, it can't stop it landing anywhere else. So you can pick it up on your hands without knowing. Your best bet is to steer clear of anyone coughing and sneezing and to wash your hands frequently."

Of course, if you're in a hypochondriacal panic, you'll probably think that anything is better than nothing. And they've got to be more effective than hiding under the kitchen table. Which, if you remember, was the government's advice for surviving a nuclear attack.

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Answers to swine flu questions

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The World Health Organization has called it a "public health emergency of international concern."

Seemingly out of nowhere, the swine flu virus has spread from person to person in Mexico and the United States, triggering global concerns as governments scramble to find ways to prevent further outbreak.

Q. What is swine flu?

A. Swine influenza, or flu, is a contagious respiratory disease that affects pigs. It is caused by a type-A influenza virus. Outbreaks in pigs occur year-round.

The most common version is H1N1. The current strain is a new variation of an H1N1 virus, which is a mix of human and animal versions.

Q. Does swine flu affect humans?

A. While the virus causes regular outbreaks in pigs, people usually are not struck by swine flu. However, there have been instances of the virus spreading to people -- and then from one person to another. The only difference is, says the CDC, transmission in the past did not spread beyond three people -- as it has done this time.

Q. What is behind the spread of the virus this time?


A. Researchers do not know yet know. People usually get swine flu from infected pigs. For example, farmers handling infected pigs can contract the virus. However, some human cases have occurred without contact with pigs or places they inhabited.

Q. What are the symptoms of swine flu?

A. The symptoms are similar to the common flu. They include fever, lethargy, lack of appetite, coughing, runny nose, sore throat, nausea, vomiting and diarrhea.

Q. How does the virus spread?

A. The virus spreads the same way the seasonal flu does. When an infected person coughs or sneezes around another person, the latter is put at risk. People can become infected by touching something with the flu virus on it and then touching their mouth, nose or eyes. An infected person can pass the virus to another before any symptoms even develop. Video Watch advice on avoiding the swine flu »

Q. Why is this spread troubling?

A. Scientists are concerned whenever a new virus is able to jump from an animal to a person -- and then spread from person to person. When the flu spreads person to person, it can continue to mutate, making it harder to treat or fight off.

The World Health Organization has said the current outbreak has "pandemic potential," and has urged governments to take precautions to prevent its spread. If the virus continues to mutate, drug makers won't be able to come up with vaccines fast enough.

Q. Can swine flu be fatal?

A. Just like the regular flu, swine flu worsens pre-existing medical conditions in people. So people with already compromised immune systems can die after contracting it.

Q. But doesn't the common flu kill more people?

A. Yes, common seasonal flu kills 250,000 to 500,000 people worldwide every year. But what worries officials is that a new strain of the flu virus can spread fast because people do not have natural immunity and vaccines can take months to develop.

Q. Have there been swine flu outbreaks in the past?

A. From 2005 to January 2009, 12 human cases of swine flu were detected in the United States, without deaths occurring, the CDC said. In September 1988, a healthy 32-year-old pregnant woman in Wisconsin was hospitalized for pneumonia after being infected with swine flu and died a week later. And in 1976, a swine flu outbreak in Fort Dix, New Jersey, caused more than 200 illnesses and one death.

Q. What does the World Health Organization mean when it says swine flu has "pandemic potential"?

A. If the virus spreads over a wide geographic area and affects a large segment of the population, it is upgraded from an "epidemic" to a "pandemic."

Q. How deadly have pandemics been in the past?

A. In 1968, a "Hong Kong" flu pandemic killed about 1 million people worldwide. And in 1918, a "Spanish" flu pandemic killed as many as 100 million people.

Q. How can one keep from getting swine flu?

A. There are no vaccines available. But several everyday steps can help prevent the spread of germs: Washing hands frequently; avoiding close contact with people who are sick; and avoiding touching surfaces that might be contaminated.

Q. Are there medicines to treat swine flu?

A. Yes, the CDC recommends using anti-viral drugs. They keep the virus from reproducing inside the body. And in an infected person, the drugs make the illness milder.

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Q. Can one contract swine flu from eating or preparing pork?

A. No. Pork and other pig-derived products, if properly handled and cooked, do not transmit swine flu. The flu virus is killed by cooking temperatures of 160°F (70°C

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