NBC's chief science and health correspondent Robert Bazell answers your questions about the swine flu vaccine. Should there be concern because this vaccine was rushed that there may not have been as ...

The makers of the nasal spray version of the flu vaccine say now they know why it has failed to protect young U.S. children against swine flu — fragile doses got too warm. The AstraZeneca FluMist ...

The effectiveness of this season’s flu vaccine in Canada is 40% against medically attended infection with influenza A (H3N2) ...

There has been a fear that the swine flu vaccine, Pandemrix, would increase the risk of autoimmune diseases other than narcolepsy. However, a new study of children from Sweden and Finland shows that ...

FORT JACKSON, S.C. – Thousands of Army recruits in training have to line up at least once more before heading home for the holidays — for mass inoculations of hundreds at a time against swine flu. The ...

Studies of the new H1N1 vaccine show children 10 and older will need just one shot for protection against swine flu — but younger kids will need two. The National Institutes of Health says that ...

Add Yahoo as a preferred source to see more of our stories on Google. The flu season is ramping up in a big way as an influenza A H3N2 mutation called subclade K drove a near 15% increase in clinical ...

Flu season is not over yet, experts warn. Is there a second wave coming? Here's how to protect yourself as influenza keeps spreading.

Jeb Teichman’s phone rang just before midnight. As a pediatrician, he has received many late-night emergency calls. This time, the call was about his 29-year-old son. Brent Teichmanhad been suffering ...