Pandemic influenza-a timeline.

摘要

On Aug 10, 2010, WHO declared the end of the influenza pandemic, just over a year since it began. Here is a reminder of how events unfurled. Early 2009-The earliest confirmed case of infection with what WHO subsequently dubbed pandemic H1N1 2009 virus was a 6-month-old girl from San Luis Potosi state, Mexico with symptom onset on Feb 24. Almost 2 months later, on April 19, Mexico declared a national alert.