Since 2023, Brazil has experienced a notable rise in hepatitis A cases among adults, prompting the Ministry of Health to broaden vaccine access. While the disease was traditionally more common in children lacking proper sanitation, recent trends show a shift toward adult infections, with sexual transmission - especially through anal sex - emerging as a key mode of contagion. In 2023, about 69.5% of cases occurred in adult men.
Vaccination against hepatitis A is recommended for all travelers to Brazil.
Individuals at risk for hepatitis A, including men who have sex with men, should be vaccinated regardless of travel.