Yellow Fever Vaccination &
Malaria Risk Information

North of latitude 33° N, transmission occurs July to November; from latitude 33° N to 25° N, transmission occurs May to December; south of latitude 25° N, transmission occurs year-round.

Note: Travelers visiting cities and popular rural sites on usual tourist routes are generally not at risk, and chemoprophylaxis is therefore not recommended. Travelers on special scientific, educational, or recreational visits should check whether their itineraries include evening or nighttime exposure in areas of risk or in areas of chloroquine resistance.

mefloquine for travelers in areas of chloroquine resistance