The organism Ignacio Cirac and Oriol Romero-Isart have in mind is the flu virus.
The GlaxoSmithKline drug has been available since 1999 and stops the flu virus from spreading.
Avoid touching your eyes, nose and mouth as this can spread the flu virus to others.
Because people died not from the flu virus itself, but from the human immune system response it triggered.
But in the winter, when air from outside is heated and becomes drier, the flu virus survives well.
Mr Hilleman established that the flu virus is constantly mutating, making it difficult to provide a reliable vaccine.
Those orders are for vaccines made through traditional means: made from eggs that are injected with the flu virus.
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The link between the flu virus and air humidity has long been studied, but the results were never definitive.
It permanently blocks a key enzyme on the surface of the flu virus, stopping it from spreading to other cells.
Its technology fuses bacterial proteins with part of the flu virus so that the vaccine can be made much more cheaply.
But she said cautioned against being too enthusiastic because the flu virus may well find a way to reset its timer.
But DFSAs do so in such a way that the flu virus cannot evolve to be resistant to the drug without rendering itself useless.
This enzyme is responsible for severing the connection between the flu virus and human cell so it can move on and infect other cells.
In addition, less than half of school-age children -- the population mainly responsible for spreading the flu virus -- got the flu shot, experts said.
Among those over 65, 146 per 100, 000 were hospitalized for the flu virus, compared with a rate of 30 per 100, 000 last year, the CDC said.
However, since people with the flu virus can be highly infectious despite showing no symptoms, it would be almost impossible to create an effective quarantine regime.
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The strain H3N2 of the flu virus is causing many of the cases, reports suggest, and it is known to cause severe illness, especially among the elderly.
Even so, some analysts believe the market is overreacting to the H7N9 infections, as there is no evidence to show that the flu virus will lead to a pandemic.
The truth is that the answer is not clear at this time, and actually doing a study to determine its role in spreading the flu virus would be quite problematic.
But studying the structure of the antibody and the protein on the flu virus that it targets could make it that much more likely for a universal vaccine to be developed.
The swine flu virus that has sparked fear and precautions worldwide appears to be no more dangerous than the regular flu virus that makes its rounds each year, U.S. officials said Monday.
Once a person contracts the flu virus, he or she is contagious approximately 12 to 24 hours before the peak onset of symptoms, and is often contagious up to 24 hours after resolution of fever.
So far this year that figure is already on the rise as the flu virus has shown up in more than half of the country with 29 states reporting high or severe flu cases this winter.
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It has been a thoroughly enjoyable experience spending time with the world number one and her closest family and friends in Guadalajara, but the concerns over the flu virus have certainly put an uncomfortable edge on the past few days.
Medical historians believe that a large proportion of those who died of the Spanish flu pandemic in 1918 were not killed by the flu virus, but by secondary bacterial pneumonia, which was difficult to treat before the introduction of antibiotics.
Next year, Professor John Oxford, an expert in virology from Queen Mary's School of Medicine and Dentistry, in London, will lock volunteers in a hotel for a week, deliberately infect some with the flu virus, and wait to see what happens.
The more exposure the flu virus has to the drugs - and in some countries it is available as a preventive treatment before people even catch the infection - the more chance it has of working out how to evade their effects.
What makes this new version of the H3N2 flu virus different is that it has picked up a gene from the novel H1N1 flu virus that became a pandemic three years ago.
Swine flu is caused by a virus similar to the regular flu virus that circulates in people every year, but is a strain that is typically found only in pigs or in people who have direct contact with pigs.
With the U.S. government expected to begin a large-scale vaccination effort next month against the H1N1 flu virus, Obama said the first family will not get any special consideration compared to other Americans.
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