Yellow fever vaccination
A live vaccine that protects against yellow fever for travel to certain parts of Africa and South America, given only at registered yellow fever vaccination centres.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Yellow fever vaccine is a live vaccine given only at registered yellow fever vaccination centres, after a safety check.
- A single dose protects almost everyone and is now considered to last for life; the certificate is valid from 10 days afterwards.
- It is not suitable for everyone — for example people with weakened immunity, thymus problems, severe egg allergy, or very young infants.
- Vaccination does not replace mosquito-bite avoidance, which protects against yellow fever and other insect-borne infections.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Protects almost everyone who has it against a serious infection with no cure
People with weakened immune systems, whether from illness or medicines (including significant immunosuppressive treatment).
You may have a sore arm, mild fever, headache or aching. These usually settle on their own. Most reactions, if they happen, appear in the first five to...
A clearly issued, valid certificate and advice on keeping it safe
You may have a sore arm, mild fever, headache or aching. These usually settle on their own. Most reactions, if...
Your protection and your certificate become valid. This is why timing the vaccine at least 10 days before travel...
Continue bite avoidance in risk areas while away, as the vaccine does not protect against other mosquito-borne...
For most people a single dose is considered to give lifelong protection, so a booster is usually not needed. Keep...

What is the yellow fever vaccination?
Yellow fever is a serious viral infection spread by mosquito bites in parts of sub-Saharan Africa and tropical South America. There is no cure, so prevention through vaccination and bite avoidance matters.
The yellow fever vaccine (Stamaril in the UK) is a live vaccine, meaning it contains a weakened form of the virus. A single dose protects almost everyone who has it, and protection is now considered to last for life.
Because it is a live vaccine, it can only be given at registered yellow fever vaccination centres by trained staff, and there are important reasons some people cannot have it safely. A pre-vaccination check is done every time.
Some countries require proof of vaccination — an International Certificate of Vaccination or Prophylaxis — before letting you enter. The certificate becomes valid 10 days after vaccination and is now valid for life.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Options at a glance
These are the main approaches described in this guide. The right option depends on the diagnosis, your goals and what your clinician thinks is safe.
Standard single dose
One injection of the live vaccine, suitable for most healthy travellers aged 9 months and over going to a risk area. Protection is considered lifelong for most people.
Vaccination certificate (ICVP)
The official record some countries require for entry. It becomes valid 10 days after vaccination and is now valid for life, including older certificates that once showed an...
Medical exemption letter
For travellers who cannot have the vaccine for medical reasons but need documentation. A registered centre can issue a signed exemption, though entry is then at the...
Pre-vaccination risk assessment
A required check of your age, health, immune system, allergies and destination to decide whether the vaccine is safe and appropriate for you.
Preparing for your treatment
- Book at a registered yellow fever vaccination centre, ideally at least 10 days before travel so your certificate is valid in time.
- Bring your travel itinerary, including any countries you are passing through, as some require a certificate.
- List your medicines and any conditions affecting your immune system.
- Tell the clinic about any severe allergy, especially to eggs, and any previous vaccine reactions.
- Mention pregnancy, breastfeeding, or if you are aged 60 or over, as these need extra assessment.
- Bring any previous yellow fever certificate or vaccination records.
- Allow time for a pre-vaccination check, which is done before every yellow fever vaccine.
What happens
At a registered centre, trained staff first carry out a pre-vaccination check, going through your age, health, immune system, allergies, pregnancy or breastfeeding, and your exact travel plans. This decides whether the vaccine is safe and recommended for you.
If it is suitable, the vaccine is given as a single injection, usually into the upper arm. You may be asked to wait a short time afterwards in case of an immediate reaction.
You are given a signed International Certificate of Vaccination or Prophylaxis, which becomes valid 10 days after vaccination. If the vaccine is not suitable for you, the centre discusses alternatives, including bite avoidance and, where appropriate, a medical exemption letter.
Is this treatment right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- People with weakened immune systems, whether from illness or medicines (including significant immunosuppressive treatment).
- People with a thymus disorder, or who have had the thymus gland removed.
- People with a history of severe allergy (anaphylaxis) to egg or to vaccine components.
- Infants under 6 months; and people aged 60 or over or who are pregnant or breastfeeding need careful individual assessment as the balance of risk and benefit differs.
Delay or rearrange if…
- You have a current feverish illness — wait until you have recovered.
- You have recently had, or are about to have, another live vaccine that needs timing considered.
- Your immune-suppressing treatment is changing, so suitability needs review.
- You are unsure about pregnancy and travel to a risk area is avoidable or can be rescheduled.
Alternatives to discuss
- Strict mosquito-bite avoidance, which is essential whether or not you are vaccinated
- A medical exemption letter for those who cannot be vaccinated but need documentation
- Reconsidering or rescheduling travel to a risk area if vaccination is not safe for you
- Specialist travel medicine advice for complex medical situations
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Protects almost everyone who has it against a serious infection with no cure
- Protection from a single dose is now considered to last for life
- Provides the certificate some countries require for entry
- A medical exemption can be arranged for those who cannot be vaccinated
- Given by trained staff who assess your individual risk first
Risks & complications
- A sore arm, headache, mild fever or muscle aches in the first few days
- Feeling generally under the weather for a short time
- Needing to plan vaccination at least 10 days before travel
- More noticeable flu-like symptoms for a few days
- An allergic reaction, which is why staff observe you briefly afterwards
- Not being able to have the vaccine, so travel plans need rethinking
- A severe reaction affecting the brain and nervous system (called YEL-AND)
- A severe reaction affecting internal organs (called YEL-AVD), which can be fatal
- These serious reactions are very rare but more likely at older ages and in people who should not have had the vaccine
The serious reactions to yellow fever vaccine are very rare but can be life-threatening, and they are more likely in older people and those with weakened immunity. This is exactly why the pre-vaccination check matters — to make sure the vaccine is safe for you. Be open about your age, immune system, allergies and any thymus problems.
Published figures to discuss
Yellow fever vaccine is highly effective and most side effects are mild. The serious reactions (affecting the nervous system or internal organs) are very rare but more frequent at older ages and in people who should not have received the vaccine, which is why eligibility is checked carefully. The figures below are approximate, drawn from surveillance data, and are included only because they help convey how rare these events are.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Serious organ reaction (YEL-AVD) | Around 0.3 cases per 100,000 doses overall; higher in people aged 60 and over | Very rare but can be fatal; risk rises with age, which is why over-60s are assessed carefully. | NHS — Yellow fever vaccinationnhs.ukPublished figure |
| Serious nervous-system reaction (YEL-AND) | Around 0.8 cases per 100,000 doses overall; higher in people aged 60 and over | Very rare; usually occurs after a first dose and is more frequent at older ages. | NHS — Yellow fever vaccinationnhs.ukPublished figure |
| Mild reactions (sore arm, headache, fever, aches) | Roughly 10–30% of people, in the first 5–10 days | Usually short-lived and settle without treatment. | NHS — Yellow fever vaccinationnhs.ukPublished figure |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from the injection itself. Most people carry on as normal, though mild side effects can last a few days while your body builds protection.
- A sore or tender arm at the injection site
- Mild fever, headache or muscle aches for a day or two
- Feeling a little tired or off-colour
- No symptoms at all, which is also normal
Aftercare
- Keep your vaccination certificate safe and take it when you travel.
- Use paracetamol for a sore arm or mild fever if needed.
- Carry on with mosquito-bite avoidance in risk areas while travelling.
- Seek medical advice if you feel seriously unwell in the days after vaccination, especially with severe headache, confusion or breathing problems.
- If you were given a medical exemption instead, carry the letter and follow strict bite-avoidance advice.
- Check entry requirements for every country on your route, as some need the certificate.
- Appointment booked at a registered centre at least 10 days before travel
- Travel itinerary including transit countries
- Medicines list and details of any allergies or immune conditions
- Previous yellow fever certificate if you have one
- Somewhere safe to keep the new certificate
- Insect repellent and bite-avoidance plan for the trip
⚠ Get urgent help if…
- Severe headache, neck stiffness, confusion or fits in the days after vaccination
- High fever that is severe or persistent after vaccination
- Yellow skin or eyes, or very dark urine, after vaccination
- Breathing difficulty, widespread rash or swelling (signs of a serious allergic reaction)
- Feeling very unwell or rapidly deteriorating within a couple of weeks of the vaccine
- Any fever after travel to a yellow fever or malaria area — seek same-day assessment
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A successful vaccination means you are protected from 10 days afterwards and hold a valid certificate. For most healthy people, this protection is considered lifelong.
The vaccine protects only against yellow fever, not other mosquito-borne illnesses such as malaria or dengue. So you still need bite avoidance and, where relevant, antimalarial tablets and awareness that fever after travel needs urgent assessment.
A single dose of yellow fever vaccine is now considered to give protection for life for most people, and the certificate is valid for life. A small number of travellers, such as some who were vaccinated when very young, during pregnancy or with weakened immunity, may be advised to have a further dose before high-risk travel — a registered centre can advise.
Related tests, treatments or support
Yellow fever vaccine is often given as part of a wider travel health appointment alongside other vaccines (such as hepatitis A, typhoid or rabies) and malaria prevention advice. Being a live vaccine, its timing relative to other live vaccines may need to be considered, which the clinic will manage.
Follow-up & long-term care
Most people need no follow-up beyond keeping their certificate safe. If you could not have the vaccine, follow-up focuses on bite avoidance and rechecking suitability for future travel. Seek medical advice promptly if you feel seriously unwell after vaccination.
- Keep your lifelong certificate safe and accessible for travel.
- Re-check suitability before high-risk travel if you were vaccinated very young, in pregnancy, or with weakened immunity.
- Maintain bite avoidance on every trip to a risk area, as the vaccine does not cover other infections.
Repeat, follow-on and what comes next
- A booster is usually not needed, as one dose is considered to give lifelong protection for most people.
- Some travellers (for example those vaccinated very young, in pregnancy, or with weakened immunity) may be advised to have a further dose before high-risk travel.
- If you cannot be vaccinated, the realistic plan is exemption documentation plus strict bite avoidance.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- A clearly issued, valid certificate and advice on keeping it safe
- Written information on side effects and when to seek urgent help
- Bite-avoidance advice and, where needed, antimalarial guidance
- A documented exemption and plan for those who cannot be vaccinated
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- The registered centre's consultation and vaccine fee
- Whether a pre-travel risk assessment or wider travel appointment is included
- Whether other travel vaccines are given at the same visit
- Whether a certificate or a medical exemption letter is needed
- Location and type of centre
- Any follow-up advice for complex medical situations
- The fee for the consultation and the vaccine
- Confirmation it is a registered yellow fever vaccination centre
- That an official certificate is included
- What happens, and what it costs, if the vaccine is found unsuitable and an exemption is needed
- Whether other recommended travel vaccines are included or extra
- Advice provided on bite avoidance and what to do if unwell after travel
On the NHS? Yellow fever vaccination is not part of routine NHS care; it is given privately at registered yellow fever vaccination centres for a fee, which also issue the official certificate.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Not having a proper pre-vaccination check of immune status, allergies and age
- Being given a live vaccine despite a contraindication such as immunosuppression or thymus disorder
- Assuming the vaccine protects against malaria or dengue, and skipping other precautions
- Not being told that serious reactions, though rare, are more likely at older ages
Marketing red flags
- Offering yellow fever vaccine without being a registered centre or doing a safety check
- Glossing over contraindications such as weakened immunity or egg allergy
- Implying the vaccine covers other tropical infections
- Pressuring older travellers to be vaccinated without discussing the higher reaction risk
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Based on my exact route, do I need the vaccine, a certificate, or both?
- Is the vaccine safe for me given my age, health and any allergies?
- When should I have it so my certificate is valid in time?
- What side effects should I look out for, and when should I seek help?
- If I can't have it, can you provide a medical exemption and bite-avoidance advice?
- Do I need any other travel vaccines or malaria prevention at the same time?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my treatment, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this treatment not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Where can I get the yellow fever vaccine?
How long before travel do I need it?
Do I need a booster?
Who should not have the vaccine?
I'm allergic to eggs — can I have it?
What if I can't have the vaccine but a country requires it?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: NHS — Yellow fever vaccination NaTHNaC (TravelHealthPro) — Yellow fever NaTHNaC — Yellow fever vaccine: contraindications and precautions reminder GOV.UK — Yellow fever vaccine (Stamaril): pre-vaccination checklist (MHRA) GOV.UK — Yellow fever vaccine: stronger precautions in weakened immunity and age 60+ (MHRA)
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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