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Phylogenetic resolution of the non-B subtype infections in Quebec (n = 1845). Neighbour-joining tree shows clustering in MSM (blue) and HET (red). Large cluster outbreaks reflect domestic crossover of non-B subtypes amongst MSM, including CRF02_AG, CRF024_BG, CRF01_AE, CRF07_BC, and a novel Quebec A/B founder variant.
