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28th April 2009
WHO ups pandemic alert as Mexico flu deaths climb
we're now at phase 4 on a scale of 6.
WHO said the new phase 4 alert means sustained human-to-human transmission is causing outbreaks in at least one country, signaling a significant increase in the risk of a global epidemic, according to Mexico health department spokesman Carlos Olmos. Phase 4 doesn't mean a pandemic is inevitable, but many experts think it may be impossible to contain a flu virus already spreading in several countries. |