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”Pandemic phases
WHO uses a six-phased scale of pandemic alert to inform the world of the global spread of a new virus and as a global framework for countries in pandemic preparedness and response planning.

Based on assessment of all available information and following several expert consultations, on 11 June 2009, Dr Margaret Chan, WHO’s Director-General, raised the current level of influenza pandemic alert from phase 5 to phase 6, thereby declaring the pandemic (H1N1) 2009.

Pandemic alert phase 6 is defined as a new virus causing sustained community-level outbreaks in more than one WHO region.

The pandemic phase does not indicate the severity of disease caused by the new virus. The severity of the pandemic is classified as moderated, aggravated or severe. The current pandemic has been classified as of moderate severity.”