Figure 4
From: Can co-location be used as a proxy for face-to-face contacts?
Number of contacts as a function of the number of individuals present—InVS15. We plot the number of contacts \(c_{a}(t)\) occurring at time t in a certain area a as a function of the number of individuals \(n_{a}(t)\) present at the same time in a. The red line shows the median of the scatter plot, with error bars defined by the 25% and 75% percentiles.