Prior exposure to one strain of influenza virus may weaken children's ability to mount an effective antibody response against their subsequent exposure to a different flu strain, according to a study ...

The cold season is in full swing, throats are scratchy and noses are running. We feel ill and hope it is not the flu. The ...

While current flu shots need to be updated each season, scientists are finding new ways to make vaccine that could last much longer and cover more strains.

Add Yahoo as a preferred source to see more of our stories on Google. The new flu variant, H3N2 subclade K, is a mutation of the common flu A subtype, which is often the flu "going around" come late ...