Figure 4From: Rate of decline of antibody titers to pandemic influenza A (H1N1-2009) by hemagglutination inhibition and virus microneutralization assays in a cohort of seroconverting adults in Singapore Estimated and observed proportions by age and sampling period for titres above respective cut-off points for (A) HI ≥40, and (B) MN ≥160. The orange bars with whiskers, which represent 95% confidence interval, indicate observed proportions stratifying by age and sampling periods. The black points with 95% credible interval error bars represent the estimated proportions adjusting by age and sampling periods.Back to article page