What You Should Know About Novel Influenza A H1N1 (Swine Flu)

Novel influenza A H1N1 (swine flu) is a new flu virus of swine origin that was first detected in April, 2009. On June 11, 2009, the World Health Organization (WHO) raised the worldwide pandemic alert level to Phase 6 in response to the ongoing global spread of the novel influenza A (H1N1) virus.