PMC4784897_01
Influenza test results among adults (aged >=15 years) hospitalized with severe acute respiratory infection (N = 1,790) by date of illness onset, Jingzhou, China, April 5, 2010 to April 8, 2012.
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The number of enrolled SARI cases during the 24-month surveillance period peaked during August-September and January in 2010-2011 and during December-February in 2011-2012 (Fig 1).
Number and percent of influenza positive by type/subtype and by month of illness onset among adults (aged >=15 years) hospitalized with severe acute respiratory infection (n = 1,790), Jingzhou, China, April 5, 2010 to April 8, 2012.
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While A(H3N2) was the predominant influenza virus in the 2010 summer months, a mix of H1N1 pdm09 and B predominated in the 2010-11 winter-spring months, B in the 2011 summer months, and a mix of B and A(H3N2) in the 2011-12 winter-spring months (Fig 2).