 As the mortality of COVID-19 largely increases with age, it is important to take the age distribution of infected individuals into account. Based on the example of Germany, this study illustrates the time-dependent evolution of effective IFR over the course of the pandemic , by combining age-group specific IFR estimates from multiple recent studies worldwide with publicly available German surveillance data .
<clarity>  As the mortality of COVID-19 largely increases with age, it is important to take the age distribution of infected individuals into account. Based on the example of Germany, this study illustrates the time-dependent evolution of effective IFR over the course of the pandemic , by combining age-group specific IFR estimates from multiple recent studies worldwide with publicly available German surveillance data .
 As the mortality of COVID-19 surveillance data and age-group specific IFR estimates from multiple international studies, this work investigates time-dependent evolution of effective IFR over the course of the pandemic , by combining age-group specific IFR estimates from multiple recent studies worldwide with publicly available German surveillance data .