A rare set of human lung tissue specimens allowed experts to complete the genome of the flu virus from early in the 1918 pandemic.

H1N1 virus cases surge in the national capital, with flu-like symptoms overwhelming hospitals. Know its symptoms, spread, and prevention.

New study using ferrets, closest animal model for human flu, found influenza A infection, H1N1 in particular, may boost immunity to avian flu.

A new analysis suggests H1N1 deaths 15 times higher than lab tests counted. June 25, 2012— -- The swine flu virus, H1N1, may have killed 15 times the number of people counted by the World ...