Health
Reference only, not medical advice. Brazil is mostly tropical/subtropical: plan for heat, sun and dehydration, especially outdoors and at festivals. Use safe food/water habits and avoid untreated freshwater where sanitation is poor; schistosomiasis is reported. Mosquito-borne risks include dengue, Zika, chikungunya, Oropouche and yellow fever; malaria risk is mainly in Amazon-region states, not in Rio, São Paulo, Brasília or Iguaçu Falls per CDC. No major high-altitude concern for typical itineraries.
Vaccinations
Consult a doctor or travel clinic at least a month before travel. Be up to date on routine vaccines including MMR, polio, Tdap, flu, varicella, shingles where age-appropriate, and COVID-19. CDC recommends hepatitis A for unvaccinated travelers, hepatitis B for many travelers, and typhoid for most travelers, especially rural/smaller-city stays. Yellow fever vaccine is recommended for many states, including Rio de Janeiro and São Paulo states/cities, Brasília, Amazon-region states and Iguaçu Falls; it is not required for entry to Brazil. Some onward countries may require a yellow-fever certificate if arriving from Brazil. Ask about malaria prevention for Amazon-risk areas, rabies for animal/outdoor exposure, and chikungunya vaccine only for selected longer stays.
eSIM / connectivity
eSIM is widely usable in major cities if your phone is unlocked and compatible. Brazil’s main mobile networks are Vivo, Claro and TIM; Vivo and Claro publish eSIM activation flows, Vivo advertises a Brazil Tourist Plan, and Claro says foreign visitors can activate prepaid eSIM with a passport in physical stores. Online travel eSIMs are also common, but check which local network they use and verify coverage for Amazon, Pantanal, beaches and rural routes.
Health/vaccine info is reference only, not medical advice — consult a doctor or travel clinic; defer to CDC/WHO and official sources (as of 2026-06-20).