Fig. 4: Covariate-adjusted RSV illness cumulative incidence.

Cumulative incidence curves by 180 days since the baseline blood draw for A binding and B neutralizing antibody among pediatric participants in whom both antibodies were measured. The x-axis shows days since a participant’s baseline blood draw and the y-axis shows the cumulative incidence. Cumulative incidence curves are averaged over covariates and stratified by low, moderate, high, and very high antibody titer categories. The curves for the lowest antibody titer category where titers were below the lower limit of quantitative are not shown. The cumulative incidence estimates were obtained from the proportional hazards regression analysis. Abbreviation: RSV respiratory syncytial virus.