Dr. Margaret Chan11 June 2009—On the basis of available evidence and expert assessments of the evidence, the scientific criteria for an influenza pandemic have been met. The Director-General of WHO has therefore decided to raise the level of influenza pandemic alert from phase 5 to phase 6. "The world is now at the start of the 2009 influenza pandemic," she said at a press conference today.

WHO's Director-General's statement