Essential Yellow Fever Requirements for Kenya and Tanzania

Do you need a yellow fever vaccine for Kenya? Only travellers aged 1 or over arriving from a yellow fever risk country must show a certificate. Flying in directly from the UK, USA or Europe, no certificate is required, but the vaccine is still recommended for safari areas such as the Masai Mara, Tsavo and Lake Nakuru.

The rules change the moment your trip crosses a border. Kenya is itself on the list of yellow fever risk countries, so anyone continuing from Kenya to Tanzania or Zanzibar must show a certificate. Below are the exact rules for each route, when the vaccine is recommended, how long the certificate lasts, and where to get vaccinated.

Do I Need a Yellow Fever Vaccine for Kenya?

Kenya requires a yellow fever certificate only from travellers aged 1 year or over who arrive from a country with yellow fever risk. If you fly to Nairobi directly from the UK, the USA, Canada, Europe or Asia, you do not need to show one on arrival.

Not required, however, is not the same as not recommended. Health authorities advise the vaccine for travellers aged 9 months and over who are visiting Kenya's main safari areas, because yellow fever is present in parts of the country. That advice covers most safari itineraries, including the Masai Mara, Tsavo East, Tsavo West and Lake Nakuru.

Is Kenya a Yellow Fever Risk Country?

Yes. Kenya appears on the World Health Organization list of countries with risk of yellow fever transmission, and Tanzania's Ministry of Health lists Kenya among the endemic countries whose travellers must show a certificate. The risk is not the same everywhere in Kenya: it is considered low in the cities of Nairobi and Mombasa, parts of the coast and the former North Eastern Province.

Is the Yellow Fever Vaccine Required for Kenya If I Fly from the USA or UK?

No certificate is required for entry if you fly directly from the USA or UK, because neither is a yellow fever risk country. Check your connection, though. A stopover of 12 hours or more in a risk country can trigger the requirement on later legs of your trip, and Tanzania applies this rule strictly.

Yellow Fever Rules by Route

Whether you need a yellow fever vaccine for Kenya, Tanzania or both depends on where you arrive from, not on your nationality. Use this table to check your own itinerary.

Your route	Certificate needed?	What to know
UK, USA, Europe or Asia direct to Kenya	No	Vaccine still recommended for safari areas such as the Masai Mara.
From a yellow fever risk country to Kenya (e.g. Uganda, Ethiopia)	Yes, aged 1 and over	Carry the original certificate in your hand luggage.
Kenya to Tanzania or Zanzibar (by air or road)	Yes	Tanzania lists Kenya as endemic. This affects every Kenya and Tanzania combined safari.
Transit of 12 hours or more in a risk country, then Tanzania	Yes	Check long layovers, for example an overnight connection in Addis Ababa.
UK, USA or Europe direct to Tanzania	No	Not required when you do not come from or through a risk country.
Tanzania to Kenya	Not under the rules	Tanzania is not on the risk list, but carry your certificate if you have one, as land border officials sometimes ask.

Who Should Get the Yellow Fever Vaccine for Kenya?

The yellow fever vaccine for Kenya is recommended for most safari travellers to Kenya aged 9 months or over, and it is required for anyone combining Kenya with Tanzania. It is generally not recommended if your whole trip stays in low-risk areas.

• Recommended: travellers visiting Kenya's safari areas, including the Masai Mara, Tsavo East, Tsavo West and Lake Nakuru.
• Generally not recommended: trips limited to the cities of Nairobi and Mombasa, some coastal counties and the former North Eastern Province.
• Travellers aged 60 and over: the vaccine carries a higher risk of side effects at this age, so health advice is not to have it for low-risk trips. Discuss it with your travel clinic if you are going on safari.
• Babies under 9 months, pregnant women and people with weakened immunity: usually advised not to have it. A doctor can issue a medical exemption letter instead.

How Long Is a Yellow Fever Certificate Valid?

A yellow fever certificate is valid for life. One dose gives lifelong protection, so you do not need a booster for travel, and an older certificate still counts. The certificate becomes valid 10 days after your vaccination.

What Happens If I Arrive in Tanzania Without a Certificate?

Tanzania's Ministry of Health says travellers who need a certificate but arrive without one may be refused entry, or vaccinated on arrival for a fee and kept under public health observation for up to 10 days. Either outcome can wreck a safari schedule, so sort the certificate out before you fly.

Where Can I Get the Yellow Fever Vaccine for Kenya?

Get your yellow fever vaccine for Kenya at a registered yellow fever vaccination centre in your home country before you travel. Only these centres can issue the International Certificate of Vaccination or Prophylaxis (ICVP), the yellow card that border officials accept.

If you are already in Kenya, Kenya Port Health offers yellow fever vaccination at selected points of entry and designated facilities, and recommends doing it at least 10 days before onward travel. Ask us and we will point you to the nearest centre on your route.

Frequently Asked Questions

Do I need a yellow fever vaccine for Kenya?

You need a yellow fever certificate to enter Kenya only if you are 1 year or older and arriving from a country with yellow fever risk. Flying directly from the UK, USA or Europe, no certificate is needed, but the vaccine is still recommended from 9 months of age for safari areas such as the Masai Mara, Tsavo and Lake Nakuru.

Is Kenya a yellow fever risk country?

Yes, Kenya is listed by the World Health Organization as a country with risk of yellow fever transmission, and Tanzania treats Kenya as endemic. The risk is considered low in Nairobi, Mombasa, parts of the coast and the former North Eastern Province, and higher in many safari areas, which is why the vaccine is recommended for most safari itineraries.

Do I need a yellow fever certificate to go from Kenya to Tanzania?

Yes. Tanzania requires a yellow fever certificate from travellers arriving from endemic countries, and Kenya is on that list. This applies whether you fly into Kilimanjaro, Arusha, the Serengeti or Zanzibar, or cross by road at Namanga, so anyone on a combined Kenya and Tanzania safari should be vaccinated before the trip.

Is the yellow fever vaccination required for Kenya if I travel from the USA?

No. A traveller flying from the USA to Kenya does not need a yellow fever certificate to enter, because the USA is not a yellow fever risk country. However, the vaccine is recommended for most Kenya safari areas, and you will need the certificate if you continue to Tanzania or have a layover of 12 hours or more in a risk country.

How long is the yellow fever certificate valid for?

The yellow fever certificate is valid for life. A single dose of the vaccine gives lifelong protection, so no booster is needed for travel and older certificates remain accepted. The certificate only becomes valid 10 days after you are vaccinated, so plan the jab at least 10 days before you arrive in East Africa.

Final Thoughts

A yellow fever vaccine for Kenya is not required if you fly in directly from the UK, USA or Europe, but it is recommended for safari areas and becomes essential the moment your trip includes Tanzania or Zanzibar. Get vaccinated at least 10 days before travel, and carry the original certificate with your passport.

Rules can change, so confirm the latest requirements with your travel clinic and the official Kenya Port Health and Tanzania Ministry of Health sources before you fly. When you plan your safari with us, we check the health and entry rules for your exact route.

Sources (checked October 2026): NaTHNaC TravelHealthPro: Kenya, Kenya Port Health FAQs, and the Tanzania Ministry of Health, Yellow Fever Entry Requirements in Tanzania Mainland (July 2023). This page is general travel information, not medical advice.