[Primary care management of sexually transmitted infections (III). Viral hepatitis and HIV infection].

Routinely obtaining a sexual history is a necessary first step to identify which patients have specific sexual behaviours that may put them at risk and use appropriate protective measures, especially in vulnerable populations. However, late diagnosis of HIV infection remains very high. Combination prevention strategies based on condom promotion, harm reduction programs for people who inject drugs plus PrEP and HIV PEP are the best options to prevent new infections. Screening for STIs (including hepatotropic viruses) and early diagnosis and treatment are essential for the person since it improves the prognosis and complications and also for the community because it breaks the chain of transmission. People living with HIV who have an undetectable viral load do not transmit the virus sexually (undetectable=untransmittable).