Collection of Swab Samples During Initial and Pandemic Periods in Japan (IMAGE)

RIKEN

Collection of Swab Samples During Initial and Pandemic Periods in Japan

Caption

This figure shows the number of influenza cases reported per sentinel provider in Japan and the collection of swab samples from outpatients in Osaka, Tokyo, and Chiba areas. Swab samples were collected during initial and pandemic periods that are indicated by “I” (May 16 to May 20, 2009) and “II” (October 13, 2009, to January 6, 2010), respectively. In Japan, the first patients (three Japanese men) infected with the 2009 pdm A(H1N1) were discovered on May 9 (week 19), 2009.

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RIKEN

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