Comoros
East Africa · Africa · Physician brief
Yellow fever certificate only if arriving from a risk country
Comoros has no domestic yellow fever risk and the vaccine is not routinely recommended for travel from Switzerland. However, a YF vaccination certificate may be required if you are arriving from — or have recently transited — a country with yellow fever transmission risk. Direct travel from Switzerland is not affected.
WHO / Comoros entry requirements ↗ · Updated 2026
Limited healthcare — plan for evacuation
Medical facilities on the Comoros islands are limited, and serious illness or injury may require evacuation to Mayotte, Réunion, or further afield. Ensure travel insurance includes medical evacuation, and carry an adequate personal supply of any regular and standby medication (including malaria chemoprophylaxis).
EKRM / HealthyTravel ↗ · Updated 2026
Vaccines
Disease-specific guidance
Malaria
HighMalaria is present throughout all islands of Comoros year-round. P. falciparum (the most dangerous species) predominates and is chloroquine-resistant. Chemoprophylaxis is recommended for travelers, particularly for overnight stays outside well-protected resorts, alongside strict mosquito-bite prevention.
- Risk area
- All islands, year-round
- Species
- P. falciparum predominant; rare vivax/malariae
- Resistance
- Chloroquine-resistant
- Prevention
- Chemoprophylaxis (atovaquone-proguanil, doxycycline, or mefloquine) + bite protection
Yellow fever
NoneNo yellow fever risk in Comoros, and the vaccine is not routinely recommended for travel from Switzerland. A YF certificate may be required only if you arrive from — or have recently transited — a country with yellow fever transmission risk (see country alert). Direct travel from Switzerland is not affected.
- Risk
- None — no domestic transmission
- Vaccine
- Not routinely recommended
- Entry rule
- Certificate only if arriving from a YF-risk country
Dengue
ModerateDengue is present and transmitted by the daytime-biting Aedes mosquito, with periodic outbreaks across the Indian Ocean islands. Day-time bite prevention complements the dusk-to-dawn protection used for malaria.
- Distribution
- Present; periodic outbreaks
- Mosquito
- Aedes — bites during daytime
- Prevention
- Repellent and covering up by day
Chikungunya
ModerateChikungunya is present in the Indian Ocean region and Comoros has experienced significant outbreaks. It shares the same daytime Aedes mosquito vector as dengue, so dengue prevention also protects against chikungunya. Vaccination may be considered in outbreak settings (see EKRM statement).
- Distribution
- Present; history of large outbreaks
- Mosquito
- Aedes — bites during daytime
- Prevention
- Bite protection; vaccine in outbreak settings
General prevention
Food & water
Use bottled or treated water, avoid ice from unverified sources, and eat thoroughly cooked food served hot. Strict food and water precautions reduce the risk of traveler's diarrhea, hepatitis A, and typhoid. Healthcare facilities are limited.
Mosquito protection
Aggressive mosquito-bite prevention is essential — both malaria and dengue are present. Use DEET or picaridin repellent, cover up at dusk and after dark, and sleep under an insecticide-treated net. Daytime protection also reduces dengue risk.
Sources
Based on CDC Travelers’ Health, CDC Yellow Book, and the Swiss Federal Vaccination Schedule (BAG). Always verify current recommendations before travel.
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This brief is for informational purposes and does not replace personalized medical advice.
Consult a travel medicine specialist 4–8 weeks before departure.