(CIDRAP News) To confront the spreading swine influenza H1N1 virus, the head of the World Health Organization (WHO) today raised the agency's pandemic alert level to phase 5, one notch below a full-fledged influenza pandemic, signaling that it's time for all countries to prepare.
The move comes just 2 days after the WHO raised the alert from phase 3, where it had been for several years, to phase 4.