Emerging Infectious Disease ISSN: 1080-6059

Pandemic (H1N1) 2009 Surveillance and Prevalence of Seasonal Influenza, Singapore

Yee-Sin Leo

, David C Lye, Timothy Barkham, Prabha Krishnan, Eillyne Seow, and Angela Chow

Author affiliations: Tan Tock Seng Hospital, Singapore

Figure

Influenza-positive test results for surveillance samples obtained at the emergency department, Tan Tock Seng Hospital, Singapore, May 3–July 25, 2009. An epidemiologic week starts on a Sunday and ends on a Saturday (e.g., week 18 started on May 3 and week 29 on July 19). *Undetermined influenza A subtypes.

Figure. Influenza-positive test results for surveillance samples obtained at the emergency department, Tan Tock Seng Hospital, Singapore, May 3–July 25, 2009. An epidemiologic week starts on a Sunday and ends on a Saturday (e.g., week 18 started on May 3 and week 29 on July 19). *Undetermined influenza A subtypes.

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