id author title date pages extension mime words sentences flesch summary cache txt cord-268789-9b4quuqx Zhou, Y. Seroprevalence of antibody to pandemic influenza A (H1N1) 2009 among healthcare workers after the first wave in Hong Kong 2011-08-31 .txt text/plain 2631 151 54 We conducted a cross-sectional study of the prevalence of antibody to pandemic influenza A (H1N1) 2009 (pH1N1) among HCWs in Hong Kong in February–March 2010 following the first pandemic wave. Under good adherence to infection control guidelines, potential occupational exposures in the hospital setting did not appear to be associated with any substantial excess risk of pH1N1 infection in HCWs. Most HCWs had low antibody titres following the first pandemic wave. Among the 574 HCWs who did not report laboratory-confirmed pH1N1 infection, 11% (95% CI: 8.5e14) Table III shows the comparison of pH1N1 antibody seroprevalence in HCWs versus blood donors at the Hong Kong Red Cross involved in a separate community study. 4 In our study 19/599 (3.2%) unvaccinated HCWs reported laboratory-confirmed pandemic H1N1 infection compared with an overall rate of 1% in HCWs in Hong Kong, while 12.4% of unvaccinated HCWs had antibody titre !1:40. ./cache/cord-268789-9b4quuqx.txt ./txt/cord-268789-9b4quuqx.txt