Prevalence of low and high abundance Transmitted Drug Resistance Mutations (TDRs) by antiretroviral drug class.

N(t)RTI(s)- nucleoside(tide) reverse transcriptase inhibitor; NNRTI – non-nucleoside reverse transcriptase inhibitor, PI – protease inhibitor. Samples with multiple TDRs present with at least one TDR representing ≥20% of the viral populations were scored as having ≥20% of the viral population (e.g. M184V at 5% and a T215Y at >20% are in the ≥20% column). Only samples where all TDRs were at 1Only TDRs occurring at 2At least 1 TDR occurring at ≥20% of the viral population.