The H2N3 influenza virus, which first appeared in pigs in the Midwest United States in 2006, may pose a potential health concern to humans. This study will evaluate the safety of and immune response to a vaccine designed to protect people from the H2N3 influenza virus.

H3N2 is a strain of influenza A. It can have a more severe impact than other flu strains. Learn about recent outbreaks, outlook, prevention, and more.