Figure 2From: Time variations in the transmissibility of pandemic influenza in Prussia, Germany, from 1918–19Distribution of the time delay from onset to death during the influenza epidemic in Prussia, Germany, from 1918–19. Time from disease onset (i.e. fever) to death is given for 6233 influenza deaths. A simple 5-day moving average was applied to the original data. Data source: ref [18] (see [Additional file 2]).Back to article page