Surprise findings on HIV superinfection

Superinfection refers to acquisition of a second new strain of HIV in a person already infected.

Researchers backed by the US National Institutes of Health used an advanced, high-throughput genetic screening method to analyse blood samples from a cohort of HIV-positive heterosexual men and women in Uganda.

Surprisingly they found the superinfection rate was similar to the annual rate of new first infections – just over one infection per 100 people – suggesting newly diagnosed people with HIV should receive post-test counselling about risky practices, they said.
J Infect Dis 2012; online 5 June

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