Risk Factors for Pandemic (H1N1) 2009 Seroconversion among Adults, Singapore, 2009
Figure 2. Study of seroconversion for pandemic (H1N1) 2009 virus, Singapore, June–September 2009. Public places were as follows: mass entertainment venues (e.g., cinemas, stadiums, and theaters; shopping centers, markets, and supermarkets; restaurants, bars, clubs, and other eating or drinking establishments; places of worship; and other social gatherings with >10 persons. Horizontal lines denote error bars for the estimates.