Fig. 1

Mean number of contacts reported by participants per COVIMOD wave, split by risk status. 95% confidence intervals were obtained by bootstrapping. The x-axis represents midpoints of the period of data collection for the corresponding survey wave. Displayed are the mean overall number of contacts stratified by (a) whether the participant is aged over or under 65 (high or low age risk), and (b) whether the participant is recommended to get an annual flu vaccination due to existing health conditions or not (high or low health risk). The bottom row displays the mean number of contacts with non-household members, stratified by (c) age risk and (d) health risk status