Before revision:  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 .
After revision:  Based on the example of Germany, this study illustrates the time-dependent variations in 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 .