H1N1 influenza virus or swine H1N1 virus is a causative agent of infectious disease caused in human beings known as H1N1 or commonly referred as swine flu. The H1N1 virus mainly affects the respiratory system including nose, lungs and throat of the infected person. In addition to human, H1N1 virus affects various species such as birds, swine, horses etc. The H1N1 influenza virus caused a worldwide pandemic in the recent years. H1N1 virus can be classified on the basis of antigenicity of its ... Read more