Citations:epidemiology

Swine flu outbreak an 'international emergency': WHO

Canwest News Service and Reuters April 25, 2009



WHO said it was too soon to announce travel advisories or to advise drugmakers to switch to producing a new vaccine - to be derived from the new virus - from their traditional production of seasonal influenza vaccines.

"We do not yet have a complete picture of the epidemiology or the risk, including possible spread beyond the currently affected areas," Chan said.