Figure 16.

Contour plots of the solution to (8) at time, above, $t=4.71$ and, below, $t=4.72$, roughly corresponding to 5 p.m. of the 4^th day. Above, the case with the commuters’ movement (15), below the case with no movement. Apart from the spreading of the virus in the bottom left corner, the S distribution in the line above is symmetric w.r.t. the origin, while on the line below it is uniform. Here, differences in the virus spreading due to daily travelers are becoming evident