We inferred 15,000 within-host phylogenies relating 207 plasma HIV RNA env-gp120 sequences collected over 12 years of untreated infection (these sequences were originally published in (32)), 97 plasma HIV RNA env-gp120 sequences collected at three time points during a viremia rebound event, and 90 proviral env-gp120 sequences collected at four subsequent time points after viremia was re-suppressed on ART (Table 1; Table S1). The gene discussed is ERVW-1; the disease is infection.