Defining Moments in MMWR History: Swine Influenza A (H1N1) Infection in Two Children, Southern California, March-April 2009

In 2009, novel influenza A H1N1 virus infection in two children from southern California was first identified. This marked the beginning of the 2009 H1N1 influenza pandemic. MMWR was the first scientific publication to break the news of these cases and went on to publish critical findings from the pandemic. In this podcast, Dr. Dan Jernigan discusses this historic public health event.