Figure 1
Figure 1. Number of cases of seasonal influenza A, influenza B, and pandemic H1N1 influenza in children and young adults (aged < 22 years) and unique patients seen per year, Johns Hopkins Hospital, 1993-2009.

Number of cases of seasonal influenza A, influenza B, and pandemic H1N1 influenza in children and young adults (aged < 22 years) and unique patients seen per year, Johns Hopkins Hospital, 1993-2009.

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