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Influenza virus types isolated from 2005/2006 to 2014/2015 seasons in Japan.
Notes: Thin oblique line pattern: A/H1N1 (H1); thick oblique line pattern: A/H1N1 2009 pandemic (H1pdm); gray: A/H3N2 (H3); horizontal line pattern: B/Yamagata-lineage (B Yam); vertical line pattern: B/Victoria-lineage (B Vic).
