250 40.0 IInfluenza A no subtype IInfluenza B 35.0 Seasonal A(H3N2) 200 Pandemic H1N1 30.0 Seasonal A(H1N1) - Percent Positive (%) 25.0 150 20.0 100 15.0 10.0 50 5.0 0.0 Jul - Sep Nov Jan Mar May Jul - Sep Nov Jan Mar May Jul - Sep Nov Jan Mar May Jul - Sep Nov Jan Mar May Jul - Sep Nov Jan MarMay Jul - Sep Nov Jan Mar May '07 - '07- '07- '08- '08- '08 '08 - '08- '08- '09- '09- '09 '09 - '09- '09- '10- '10- '10 '10 - '10- '1o- '11-'11- '11 '11 - '11- '11- '12-'12- '12 '12 - '12-'12-'13- '13-'13 Number positive Percent positive (%)

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