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If Bird Flu Jumped to Humans, Could Past Flu Infections Offer Some Protection?
NPR reports on research "into whether our defenses built up from past flu seasons can offer any protection against H5N1 bird flu." So far, the findings offer some reassurance. Antibodies and other players in the immune system may buffer the worst consequences of bird flu, at least to some degree. "There's certainly preexisting immunity," says Florian Krammer, a virologist at Mount Sinai's Icahn School of Medicine who is involved in some of the new studies. "That's very likely not going to protect us as a population from a new pandemic, but it might give us some protection against severe disease." This protection is based on shared traits between bird flu and types of seasonal flu that have circulated among us. Certain segments of the population, namely older people, may be particularly well-primed because of flu infections during early childhood. Of course, there are caveats. "While this is a bit of a silver lining, it doesn't mean we should all feel safe," says Seema Lakdawala, a virologist at Emory University's School of Medicine whose lab is probing this question. For one thing, the studies can't be done on people. The conclusions are based on animal models and blood tests that measure the immune response. And how this holds up for an individual is expected to vary considerably, depending on their own immune history, underlying health conditions and other factors. But for now, influenza researchers speculate this may be one reason most people who've caught bird flu over the past year have not fallen severely ill.... Research published this month is encouraging. By analyzing blood samples from close to 160 people, a team at the University of Pennsylvania and the University of Chicago were able to show that people born roughly before 1965 had higher levels of antibodies — proteins that bind to parts of the virus — which cross-react to the current strain of bird flu. This week U.S. federal officials also "announced funding for avian influenza research projects, including money for new vaccine projects and potential treatments," the Guardian report. The head of America's agriculture department said it would invest $100 million, as part of a larger $1 billion initiative to fight bird flu and stop rising egg prices, according to the nonprofit news site Iowa Capital Dispatch. Read more of this story at Slashdot.
NPR reports on research "into whether our defenses built up from past flu seasons can offer any protection against H5N1 bird flu."
So far, the findings offer some reassurance. Antibodies and other players in the immune system may buffer the worst consequences of bird flu, at least to some degree. "There's certainly preexisting immunity," says Florian Krammer, a virologist at Mount Sinai's Icahn School of Medicine who is involved in some of the new studies. "That's very likely not going to protect us as a population from a new pandemic, but it might give us some protection against severe disease." This protection is based on shared traits between bird flu and types of seasonal flu that have circulated among us. Certain segments of the population, namely older people, may be particularly well-primed because of flu infections during early childhood.
Of course, there are caveats. "While this is a bit of a silver lining, it doesn't mean we should all feel safe," says Seema Lakdawala, a virologist at Emory University's School of Medicine whose lab is probing this question. For one thing, the studies can't be done on people. The conclusions are based on animal models and blood tests that measure the immune response. And how this holds up for an individual is expected to vary considerably, depending on their own immune history, underlying health conditions and other factors. But for now, influenza researchers speculate this may be one reason most people who've caught bird flu over the past year have not fallen severely ill....
Research published this month is encouraging. By analyzing blood samples from close to 160 people, a team at the University of Pennsylvania and the University of Chicago were able to show that people born roughly before 1965 had higher levels of antibodies — proteins that bind to parts of the virus — which cross-react to the current strain of bird flu.
This week U.S. federal officials also "announced funding for avian influenza research projects, including money for new vaccine projects and potential treatments," the Guardian report. The head of America's agriculture department said it would invest $100 million, as part of a larger $1 billion initiative to fight bird flu and stop rising egg prices, according to the nonprofit news site Iowa Capital Dispatch.
Read more of this story at Slashdot.
