ERVW-1 and infection: Most (259/283, 92%) individuals were sequenced in both gag and env sub-genomic fragments; 71% (183/259) had concordant subtypes and 29% (76/259) had discordant subtypes suggesting infection with intersubtype recombinant viruses in the two regions, whereas 98% (276/283) had sequences only for gag and 94% (266/283) in env only.