[From HIV screening to diagnosis : indications, tests, and post-exposure prophylaxis].

Despite the substantial national resources invested in the fight against HIV to achieve its elimination, its incidence has remained stable in recent years. In 2022, the FOPH estimated that 7% of people living with HIV in Switzerland remained undiagnosed, underlining the potential for improving screening. The aim of this article is to present the process of HIV screening and diagnosis in clinical practice, adapted to the Federal Office of Public Health (FOPH) national strategy, and including the different indications for screening, the interpretation of available tests, and the place of post-exposure prophylaxis (PEP).