Health
For visitors, plan around food/water hygiene, mosquito and tick bites, and changing conditions by altitude. CDC notes malaria risk in areas below 1,800 m, plus dengue and other bite-borne risks; use repellent, covered clothing, screened rooms/bed nets. Avoid untreated freshwater because of schistosomiasis risk. Kilimanjaro/Ngorongoro trips need altitude planning; coast/Zanzibar can be hot and humid. This is reference info, not medical advice.
Vaccinations
Consult a doctor or travel clinic at least 4-6 weeks before travel. Be up to date on routine vaccines such as MMR, polio, Tdap, flu, varicella, shingles where applicable, plus COVID-19. CDC commonly recommends hepatitis A, hepatitis B, typhoid, and malaria prevention discussion for Tanzania; cholera vaccination may be considered for some itineraries, and rabies pre-exposure vaccine may matter for animal contact or remote travel. Yellow fever vaccine is generally not recommended for Tanzania itself and is not required for direct travel from the United States, but proof is required for travelers age 1+ arriving from, or transiting over 12 hours in, a yellow-fever-risk country.
eSIM / connectivity
eSIM is usable for many travelers through international travel-eSIM providers, but direct local eSIM availability can vary by carrier and shop. Major mobile networks include Vodacom, Airtel, Yas/Tigo, Halotel, TTCL and Zantel; Vodacom/Airtel/Yas are common choices on the mainland, while Zantel is notable in Zanzibar. Physical prepaid SIMs and data bundles are still common at airports and city shops; expect passport/biometric registration.
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).