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Age-specific infection attack rate and clinical severity profile of 2009 H1N1pdm09 infections in Hong Kong (Wu et al. 2010b). (A) Estimates of the risk of infection in each age group based on a large serologic study (Wu et al. 2010b). (B) Age-specific estimates of the clinical severity profile of H1N1pdm09 in Hong Kong based on the estimated attack rates and the numbers of severe outcomes recorded in the territory.
