Traditionally, vaccines were manufactured from the complete organism, such as an inactivated flu virus.
Or you may be exposed to a flu virus that is not included in the vaccine.
The organism Ignacio Cirac and Oriol Romero-Isart have in mind is the flu virus.
The researcher also looked at studies dating back to the 1940s of airborne flu virus survival.
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.
"This is because young people have not seen a flu virus like this one before, " she noted.
In the aftermath of the H1N1 flu virus scare, vacation destinations there "were just brutalized, " said Beattie.
The swine flu virus can have more serious effects on people living in poverty, the WHO says.
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.
Jude Hospital in Memphis, Tennessee, used reverse genetics to produce a vaccine against the H5N1 avian flu virus.
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 World Health Organization says there have now been five deaths in China from a new bird flu virus.
Six people have died after being infected with the H7N9 bird flu virus, according to Chinese state media Friday.
Three players at the club have been recovering from the swine flu virus.
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.
When a new flu virus pops up, "we immediately begin to think about the process of making a vaccine, " Bresee said.
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.
At the end of our conversation, we asked about a number of reports that the H1N1 flu virus is in decline.
They spiked droplets of human mucus with live flu virus, and then exposed it to air with varying levels of moisture.
China has begun a mass slaughter of poultry at a market in Shanghai, after a new bird flu virus was detected there.
"To start with, we'll take 15 volunteers, with no immunity to the particular flu virus and infect five of them, " he said.
The CDC also reports that the flu vaccine, which protects against several types of flu virus, is about 62% effective this year.
Flu virus "prefers lower humidity and lower temperatures for transmission, " she said.
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Flu virus is found throughout nature and different strains can infect a variety of hosts including humans, dogs, horses, swine, bats and birds.
The current U.S. pandemic control strategy is based on computer simulations that assume a flu virus with an R-naught between 1.6 and 2.4.
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