Understanding PrEP in Brazil: Daily vs. On‑Demand and the Promise of Digital Support Oral HIV pre-exposure prophylaxis (PrEP) shields sexually active individuals from HIV infection using two antiretroviral drugs. In Brazil, as in many places, PrEP is most commonly taken daily, while an event‑driven or on‑demand regimen (2+1+1 dosing) offers an alternative for those with…