Fig. 1.

Time course of first reported cases and pandemic peak of laboratory-confirmed pandemic influenza A(H1N1) 2009 cases reported to the World Health Organization by selected countries and areas during the first year of the pandemic by geographic zone, Western Pacific Region

Souce: Situation updates – Pandemic (H1N1) 2009, WHO (http://www.who.int/csr/disease/swineflu/updates/en/index.html). Data sources for these updates varied by country and included: country-provided epidemic curves of case onset, ILI consultation rates and virus isolates