Sexually Transmitted Infections

The predominant transmission mode of both HIV and other STIs is sexual intercourse. In addition, strong evidence supports several biological mechanisms through which STIs facilitate HIV transmission by increasing both HIV infectiousness and HIV susceptibility. Having an STI increases the risk of HIV transmission regardless of whether it is the HIV-positive partner or the HIV-negative partner who has the STI. Methods for preventing sexual transmission of HIV and STIs are the same, as are the target audiences for interventions. It therefore makes sense to integrate the programmes tackling both.

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