Comparison of Pandemic (H1N1) 2009 and Seasonal Influenza, Western Australia, 2009
Dale Carcione, Carolien Giele, Gary K. Dowse, Donna B. Mak, Leigh Goggin, Kelly Kwan, Simon Williams, David Smith, and Paul Effler
Author affiliations: Author affiliations: Communicable Disease Control Directorate, Perth, Western Australia, Australia (D. Carcione, C. Giele, G.K. Dowse, D.B. Mak, L. Goggin, K. Kwan, P. Effler); PathWest Laboratory Medicine, Nedlands, Western Australia, Australia (S. Williams, D. Smith)
Figure 1. Number of notifications for pandemic and seasonal influenza, by date of onset and type, Western Australia, May 22–September 11, 2009. Influenza subtypes reported during the study period (n = 3,178): pandemic (H1N1) 2009, 2,794 (87.9%); influenza A (H3N2), 253 (8.0%); seasonal influenza A (H1N1), 89 (2.8%); influenza B, 36 (1.1%); and seasonal influenza A (not subtyped), 6 (0.2%).
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