One in six people not on treatment in a large South African household survey already had drug-resistant HIV and more than half of those on treatment had resistance to at least one drug, researchers from the Human Sciences Research Council, Pretoria, the National Institute for Communicable Diseases, Johannesburg, the US Centres for Diseases Control and Prevention and the University of Cape Town reported at the recent Conference on Retroviruses and Opportunistic Infections 2019 in Seattle.

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