Figure 4.

Distributions of the TMRCA for all pairs of genomes with the same ST and isolated within a month of each other. Top left: 48 pairs not from ST1 and with an epidemiological link based on shared time and space on a ward. Bottom left: 118 pairs not from ST1 and without an epidemiological link. Top right: 310 pairs from ST1 and with an epidemiological link. Bottom right: 149 pairs from ST1 and without an epidemiological link.