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Men taking HIV treatment have undetectable viral loads in the rectum; sexually transmitted infections make no difference

Newly adopted risk behaviours predict HIV infections in Portuguese gay men

Opioid substitution treatment increases chances that people who inject drugs will have good adherence to HIV therapy

Six in ten US HIV infections are transmitted by people who know they have HIV but are not in care

Chinese study sheds light on how well treatment may work as prevention in the real world

HCV sexual transmission linked to anal sex, drug use, lower CD4 count

Most HIV-positive gay men in European survey are on HIV treatment, though fewer in the east

More people in the UK are starting HIV treatment early, in order to reduce their risk of transmission

Good mental health associated with excellent adherence among people taking ART for prevention