What is H1N1 virus and Influenza A?
Influenza A is a respiratory illness with multiple strains. In recent years, most seasonal flu has been either an H1N1 or H2N3 strain; however, in 2009, a new strain of H1N1 appeared. To avoid confusion with older common strains of H1N1, the new virus is referred to as “novel H1N1 influenza.” For most people who contract the H1N1 virus, the illness is comparable in severity to the traditional seasonal flu.
