Result: Given the low prevalence of non-B subtypes in the study population, associations between specific viral subtypes and the presence of polymorphic mutations were not particularly relevant in the context of the study population, e.g.,
V106I was present in all F1 subtypes; however, only 6/6661 F1 viruses were observed, while
V106IM (generally combined with other
NNRTI mutations) was observed in 231/6577 (3.5%) subtype B viruses.