In the upper part of the figure, the grey line shows the median length of hospital stay of patients admitted during the following 10 days (moving median). The dotted black line illustrates the partial linear trend, showing a significant decrease in median hospital stay (days) starting one week after mass vaccination commenced (p= 0.029). In the lower part of the figure, the bar chart shows the number of admitted patients included in the study each day. (Not all admitted patients where included in the study).

Figure 1: The median length of hospital stay (days) with regard to the timing of mass vaccination.