Comparison of modelled and recorded estimates by age group for studies reporting RSV-associated hospitalisation rates. The y -axis represents the ratio of recorded estimates to modelled estimates and is displayed in log scale. Number at the bottom of indicates number of data-points, if studies reported estimates for multiple years or seasons, then this study contributes to multiple data points. Recorded estimates, also called directly observed number/rate, represents hospital admissions with laboratory confirmed virus infection. Modelled estimates represent hospital admissions rate estimated from statistical models