Influenza — Worldwide/Unknown
During 19 May-8 Sep 2013, the United States experienced low levels of seasonal influenza activity overall. Influenza A (H1N1) pdm09 (pH1N1), influenza A (H3N2), and influenza B viruses were detected worldwide and were identified sporadically in the United States. In June [2013], influenza A (H3N2) variant viruses (H3N2)v were first detected in Indiana, and between 18 Jun and 28 Sep 2013, a total of 20 cases of influenza A variant viruses ([H3N2]v and influenza A (H1N1) variant [H1N1]v) were
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