Influenza virus infections in Hong Kong in 2013-14: a community-based longitudinal seroepidemiological study
BJ Cowling, JSM Peiris, KO Kwok
School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong
1. We conducted a longitudinal serologic study and estimated that between 3% to 7% of unvaccinated people in Hong Kong were infected in each of four influenza epidemics in 2013 and 2014.
2. Incidence of influenza virus infections was relatively low in children, in contrast to the very high incidence of infections reported in the 2009 pandemic.