H1N1 Influenza Virus of Swine Origin: Emergence of a New Pandemic Strain
October 29, 2009
A novel H1N1 influenza virus has emerged from swine and is causing a worldwide pandemic. Children and young adults have been most affected, in terms of both numbers of cases and severity of disease. Perhaps the most striking feature of the pandemic so far is that fewer than half of those hospitalized or killed by this virus have had identifiable prior medical conditions or risk factors.