School Closure and Mitigation of Pandemic (H1N1) 2009, Hong Kong
Joseph T. Wu, Benjamin J. Cowling , Eric H.Y. Lau, Dennis K.M. Ip, Lai-Ming Ho, Thomas Tsang, Shuk-Kwan Chuang, Pak-Yin Leung, Su-Vui Lo, Shao-Haei Liu, and Steven Riley
Author affiliations: The University of Hong Kong School of Public Health, Hong Kong Special Administrative Region, People’s Republic of China (J.T. Wu, B.J. Cowling, E.H.Y. Lau, D.K.M. Ip, L.-M. Ho, S. Riley); Centre for Health Protection, Hong Kong (T. Tsang, S.-K. Chuang); Hospital Authority, Hong Kong (P.-Y. Leung, S.-V. Lo, S.-H Liu); and Food and Health Bureau, Hong Kong (S.-V. Lo)
Figure. Epidemiologic characteristics of pandemic (H1N1) 2009 in Hong Kong Special Administrative Region, People’s Republic of China, during May through August 2009. A) Time series of laboratory-confirmed pandemic (H1N1) 2009 cases classified as imported or nonimported (by age group) by date of illness onset. B) Estimates of the proportion of cases with illness onset on each day that would subsequently be identified and laboratory confirmed (reporting rates). C) Time series of nonimported pandemic (H1N1) 2009 cases by date of illness onset and the estimates of the underlying true epidemic curve (dashed line) and the fitted observed epidemic curve allowing for changes in reporting rates (solid line). Dots indicate cases reported on a given day. Number of cases plotted logarithmically. D) Distribution of ages of laboratory-confirmed pandemic (H1N1) 2009 cases over time plotted as 3-day rolling averages. Error bars indicate 95% confidence intervals.
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