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Multiple T/F virus transmission in VAX003 placebo recipient subjects. ML trees and Highlighter plots of HIV-1 gp160 env sequences from subject 3090 (A) and subject 3007 (B), each phylogeny revealing productive infection by at least 3 viruses. T/F virus lineages are color-coded and labeled variant (V)1–3; recombinant (R) sequences shown in orange. Abbreviations: HIV-1, human immunodeficiency virus type 1; ML, maximum likelihood; T/F, transmitted/founder.
