Emerging Infectious Disease ISSN: 1080-6059

Optimizing Use of Multistream Influenza Sentinel Surveillance Data

Eric H. Y. Lau*, Benjamin J. Cowling*

, Lai-Ming Ho*, and Gabriel M. Leung*

Author affiliations: *University of Hong Kong, Hong Kong Special Administrative Region, People’s Republic of China;

Figure

Nine annual cycles (unbroken lines) of general practitioner (A) and general outpatient clinic (B) geographic sentinel surveillance data from Hong Kong Island, Kowloon, New Territories East, and New Territories West, 1998–2007. The monthly proportions of laboratory samples testing positive for influenza isolates are overlaid as gray bars, and the beginning of each annual period of peak activity (inferred from the laboratory data) is marked with a vertical dotted line. ILI, influenza-like illness.

Figure. Nine annual cycles (unbroken lines) of general practitioner (A) and general outpatient clinic (B) geographic sentinel surveillance data from Hong Kong Island, Kowloon, New Territories East, and New Territories West, 1998–2007. The monthly proportions of laboratory samples testing positive for influenza isolates are overlaid as gray bars, and the beginning of each annual period of peak activity (inferred from the laboratory data) is marked with a vertical dotted line. ILI, influenza-like illness.

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