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Age-stratified outcome rates in the cohorts. The numbers in each cell represent the percentage experiencing the outcome (number of individuals experiencing the outcome/number of patients in each stratum). The analysis of 90-day all-cause mortality was restricted to patients attending the emergency department up until 17 July 2022 to enable for 90 d of follow-up. Abbreviations: ICU, intensive care unit; RSV, respiratory syncytial virus.
