Real disease "detectives" use evolutionary biology

I wrote recently how evolution and phylogenetic analysis of HIV isolates has provided evidence that the progenitor to HIV jumped into humans in Cameroon or a nearby area. Obviously it’s a topic that’s interesting to me, but may seem a bit esoteric to some. RPM over at Evolgen has a new post showing another application of phylogenetic analysis to HIV that may be of interest to readers here, where infectious disease epidemiology meets CSI.