Over the weekend, health officials in Spain reportedly informed the World Health Organization (WHO) of a possible human case of swine flu that may have been caused by person-to-person transmission.

Flu pandemics don't happen very often. So many people might feel the relative fizzle of a flu pandemic three years ago somehow immunizes the globe against another one for awhile. But don't relax, say ...

Add Yahoo as a preferred source to see more of our stories on Google. This flu season has been harsh. As of Dec. 27, there have been 11 million reported cases, 120,000 hospitalizations, and 5,000 ...

(CNN) -- Pigs at family-friendly fairs are responsible for infecting children with a type of swine flu not previously seen in humans, according to a report published by Thursday by the US Centers for ...

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 ...

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 ...

Flu season is starting to tick up in the U.S. And, looking at clues from other countries, we may be in for a rough winter. But not all influenza is the same. And there are some notable differences ...

Add Yahoo as a preferred source to see more of our stories on Google. Over the weekend, health officials in Spain reportedly informed the World Health Organization (WHO) of a possible human case of ...