WHO published interim guidelines on the prevention of sexual transmission of Zika virus in September 2016, based on a limited amount of evidence under an emergency process during a public health emergency of international concern (PHEIC). The body of evidence has grown considerably since then, and WHO ex...

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This guideline covers needle and syringe programmes for people (including those under 16) who inject drugs. The main aim is to reduce the transmission of viruses and other infections caused by sharing injecting equipment, such as HIV, hepatitis B and C. In turn, this will reduce the prevalence of blood-b...

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