Over the weekend, health officials in Spain reportedly informed the World Health Organization (WHO) of a possible human case ...

Influenza D virus, a pathogen best known for causing respiratory illness in cattle, appears to be silently infecting farmworkers across multiple continents, according to a growing body of serological ...

Chinese researchers have discovered a new type of swine flu that can infect humans and has the potential to cause a future pandemic, according to a study released on Monday, though scientists have ...

A new University of California San Diego study published in Cell challenges a long-standing assumption about how animal viruses become capable of sparking human epidemics and pandemics. Using a ...

A swine flu case in Spain with no pig exposure has raised questions about how the virus spread and triggered international health monitoring.

(AP) -- Health experts say extraordinary measures against swine flu - most notably quarantines imposed by China, where entire planeloads of passengers were isolated if one traveler had symptoms - have ...