Health
Seychelles is a low-altitude tropical island destination; heat, strong sun, dehydration and marine safety matter more than altitude. Use safe food/water habits, especially away from resorts. CDC notes mosquito-borne dengue and Zika risk and a chikungunya outbreak notice in 2026; prevent bites day and night. Malaria is not listed by CDC as a routine traveler risk for Seychelles.
Vaccinations
Before travel, consult a doctor or travel clinic. Be up to date on routine vaccines, including MMR, polio, flu, varicella, Tdap, shingles as age-appropriate, plus COVID-19. CDC recommends hepatitis A for unvaccinated travelers, hepatitis B for unvaccinated travelers of all ages, typhoid for most travelers, and chikungunya vaccination for people traveling to an outbreak area; rabies pre-exposure vaccine depends on activities and access to care. Yellow fever vaccine is not recommended for Seychelles itself, but an ICVP yellow-fever certificate is required for travelers age 1+ arriving from, or transiting more than 12 hours through, countries with yellow-fever transmission risk.
eSIM / connectivity
Connectivity is generally good on the main islands, with 4G service from local networks such as Airtel Seychelles and Cable & Wireless Seychelles; Intelvision also offers telecom/broadband services. eSIM coverage for Seychelles is widely sold by international travel-eSIM providers, but local-operator eSIM/tourist eSIM availability can change, so verify with the carrier before departure. Physical prepaid SIMs and local data bundles remain the most reliable visitor option.