Yellow Fever Vaccine: Everything You Need to Know Before You Travel

If you are planning a trip to Africa or South America, there is one travel health step that can make the difference between boarding your flight and being turned away at the border. The yellow fever vaccine is one of the few travel vaccinations that is not just recommended , in many countries it is a legal requirement for entry.

This guide covers everything you need to know: what yellow fever is, who needs the vaccine, which countries require it, how the certificate works, and what to expect when you come in for your appointment at Longeva Clinic.

Yellow fever is a serious viral infection spread by the bite of infected Aedes mosquitoes. It is found in tropical and subtropical regions of sub-Saharan Africa and South America. The name comes from one of the most recognisable symptoms of severe infection: jaundice, which causes the skin and whites of the eyes to turn yellow.

For most travellers, the risk of contracting yellow fever on a typical holiday is low , but it is not zero. The disease has a high mortality rate in severe cases, and there is no specific antiviral treatment once infection occurs. The only reliable protection is vaccination before travel.

The World Health Organisation estimates there are between 84,000 and 170,000 severe cases of yellow fever globally each year, resulting in up to 60,000 deaths. Outbreaks can occur rapidly and unpredictably , Brazil saw a major outbreak between 2016 and 2018, and parts of West Africa have experienced recurring outbreaks in recent years.

You should consider the yellow fever vaccine if you are:

•       Travelling to any country in sub-Saharan Africa or South America where yellow fever is present or risk of transmission exists

•       Travelling to a country that requires proof of yellow fever vaccination as a condition of entry , even if you are only transiting through

•       Travelling through a country with yellow fever risk en route to your destination, as some countries require proof of vaccination based on your entire journey, not just your final destination

•       A healthcare worker, researcher, or aid worker in a risk region

•       Planning extended travel or living in a risk area

The vaccine is recommended for most adults and children aged 9 months and over. It is not suitable for infants under 9 months, people with certain immune conditions, those with a severe egg allergy, or individuals with thymus disorders. If you are pregnant, breastfeeding, or aged over 60, a clinical assessment is required before vaccination , but it can often still be given where the risk of travel without it is considered higher.

Our pharmacist will carry out a full suitability assessment at your appointment before the vaccine is administered.

This is where many travellers get caught out. There are two distinct groups of countries:

•       Group 1: Countries that require proof of yellow fever vaccination from ALL arriving travellers

•       Group 2: Countries that require proof only from travellers arriving from countries where yellow fever is present or endemic , including transit stops

This means your route matters as much as your destination. If you are flying from the UK to Kenya via a West African hub, Kenya may require your yellow fever certificate because you transited through a risk country , even if your layover was only a few hours.

Key countries where yellow fever vaccination is required or strongly recommended:

When you receive the yellow fever vaccine at a registered vaccination centre, you are issued with an International Certificate of Vaccination or Prophylaxis , known as the ICVP, or sometimes the "yellow card". This is an official WHO document that serves as legal proof of your vaccination for international travel.

Key facts about the ICVP:

•       Your ICVP becomes valid 10 days after the date of your vaccination , not on the day you receive it

•       As of 2016, all ICVP certificates are valid for life , even older ones that show an expiry date on them

•       You must present your original ICVP at border control , a photograph on your phone is not accepted

•       Your ICVP must be completed correctly with the vaccine batch number, date, clinic stamp and authorised signature , an incomplete certificate may be rejected

•       If you lose your ICVP, a replacement may be issued if the original clinic can verify your vaccination details

Timing is critical. The ICVP certificate does not become valid until 10 days after vaccination, and that date is strictly enforced at border control. A certificate issued on day one of your trip serves no purpose at all.

We recommend booking your yellow fever vaccination as part of a full travel health consultation at least four to six weeks before you travel. This gives time for the vaccine to take effect and also allows us to arrange any other vaccinations you may need , some of which require multiple doses spaced weeks apart.

If your travel is sooner than this, do not panic , contact us and we will advise on the most appropriate approach. Leaving it until the week before travel risks your certificate not being valid in time.

The yellow fever vaccination appointment at Longeva Clinic follows a structured process to ensure you are properly assessed and that your certificate is correctly completed.

•       Pre-appointment: you will complete a short health questionnaire covering your medical history, current medications, and travel itinerary

•       Consultation: our GPhC-registered pharmacist will review your itinerary, assess your suitability for the vaccine, and discuss any other travel health preparations you may need

•       Vaccination: a single subcutaneous injection into the upper arm , the appointment takes approximately 20 minutes in total

•       Certificate: your ICVP will be completed and issued at your appointment, stamped with our registered Yellow Fever Vaccination Centre stamp

•       Aftercare: you will leave with written aftercare advice and information on what to do if you experience any side effects

You will need to bring a valid form of ID , ideally your passport , to your appointment.

The yellow fever vaccine has an excellent safety record and has been in use for decades. For the vast majority of people it is very well tolerated.

Common side effects (affect up to 1 in 3 people):

•       Mild soreness, redness, or swelling at the injection site

•       Mild headache

•       Low-grade fever

•       Muscle aches or mild fatigue

These side effects typically resolve within a few days and do not require treatment. They are a normal sign that your immune system is responding to the vaccine.

Rare but serious side effects:

Serious adverse reactions to the yellow fever vaccine are uncommon, but they exist and are taken seriously. A very rare reaction called yellow fever vaccine-associated viscerotropic disease (YEL-AVD) can cause problems affecting major organs. It is more likely in people aged over 60 or those with thymus conditions , which is why careful pre-vaccination assessment matters.

If you feel significantly unwell in the days or weeks following your vaccine, seek medical advice promptly.

Do I need the yellow fever vaccine if I am only transiting through a country?

Possibly. Some countries require proof of yellow fever vaccination if you have transited through a risk country , even for a layover of a few hours. This depends on the transit country, your final destination, and the duration of the transit. Always check the full requirements for every country in your journey, not just your final destination. Our pharmacist will review your complete itinerary at your travel health consultation.

I had the yellow fever vaccine years ago. Do I need a booster?

For most adults who were vaccinated after the age of 2 and were not pregnant or immunocompromised at the time, a single dose provides lifelong protection and no booster is needed. If you were vaccinated under the age of 2, while pregnant, or while immunocompromised, a further dose may be recommended. If your ICVP shows an expiry date, the certificate is still valid , all yellow fever certificates are now recognised as valid for life under International Health Regulations.

Can I get the yellow fever vaccine on the NHS?

No. The yellow fever vaccine is not available on the NHS and must be obtained from a registered private Yellow Fever Vaccination Centre. Longeva Clinic is a registered Yellow Fever Vaccination Centre, and appointments can be booked online.

How much does the yellow fever vaccine cost?

The yellow fever vaccination at Longeva Clinic is £65, which includes the ICVP certificate. If you need a replacement certificate because your original has been lost, the fee is £25. Our travel health consultation fee of £35 applies if you are also receiving a full travel health assessment alongside the vaccination.

What happens if I lose my yellow fever certificate?

If you were vaccinated at Longeva Clinic, we can issue a replacement ICVP provided we can verify your original vaccination record. If you were vaccinated elsewhere, contact the original clinic. You will need the date of vaccination and ideally the vaccine batch number. In cases where no record can be found, re-vaccination may be offered , this is safe as there is no harm in receiving a second dose.

Longeva Clinic is a GPhC-registered Yellow Fever Vaccination Centre. Our pharmacist-led travel health service includes a full pre-travel consultation, suitability assessment, vaccination, and ICVP certificate , all in one appointment.

We recommend booking at least four to six weeks before your travel date to ensure your certificate is valid in time for departure.

Longeva Clinic  ·  Unit 1 Chichester Court, Milnrow Road, Rochdale, OL16 1UG  ·  hello@longevaclinic.co.uk

CLINICAL DISCLAIMER

This article is written for general informational purposes and does not constitute medical advice. Country entry requirements for yellow fever vaccination change regularly , always check the TravelHealthPro Country Information pages and discuss your specific itinerary with a qualified travel health professional before travel. Longeva Clinic is registered with the GPhC (registration number 2241860). Always book a consultation to confirm the vaccinations appropriate for your individual trip.