What Are the Symptoms of Yellow Fever?
If you are travelling to an area where yellow fever is present, you may wonder what symptoms to look out for. They usually begin within three to six days of an infected mosquito bite and often feel like flu. Most people recover, but a small number develop more serious illness. For more on symptoms, progression and treatment, see the NHS guidance on yellow fever.
What Is Yellow Fever and How Do You Catch It?
Yellow fever is a viral infection spread by infected mosquitoes, mainly in parts of sub-Saharan Africa and South America. You cannot catch it from another person, and it is not found naturally in the UK. The mosquitoes that carry the virus tend to bite during the day, so protection matters throughout daylight hours, not just at dusk or overnight.
What Are the Early Signs of Yellow Fever?
Early yellow fever disease often feels like a bad case of flu, which can make it easy to dismiss at first. Initial symptoms typically include a sudden high temperature, chills, headache, muscle and back pain, nausea or vomiting, and loss of appetite.
These symptoms usually last for three to four days, and most people recover without developing further complications. Because the symptoms are so general, mentioning recent travel to your doctor is essential for an accurate diagnosis.
Why aren’t all travel vaccines free?
NHS funding for travel vaccines follows public health guidance, not personal travel risk. Diseases with wider transmission potential in the UK tend to sit on the free list. Vaccines protecting mainly the individual traveller usually sit outside NHS funding.
Being free or private does not mean one vaccine is more important than another. What you need depends on where you are going and what you will be doing there.
How Does Yellow Fever Progress in Severe Cases?
Around 15% of people go on to develop a more serious second stage, sometimes within 24 hours of appearing to improve. This can include jaundice, which is yellowing of the skin and eyes, along with kidney problems and bleeding from the mouth, nose, eyes or stomach. Up to half of those who reach this stage do not survive, so prompt medical care is essential. The potential for severe illness is why yellow fever is taken seriously by travel health professionals.
What Should I Do If I Suspect Yellow Fever?
Seek medical help immediately if you develop these symptoms while travelling, or shortly after returning from an area where yellow fever is found. Do not wait until you are back in the UK if you are still abroad. Tell any doctor about your recent travel and any mosquito bites, since this helps them diagnose the illness accurately. There is no specific cure for yellow fever, so treatment focuses on supportive care, fluids and close monitoring.
How Can I Protect Myself Before Travelling?
It is worth planning your protection before you fly. Avoiding mosquito bites with repellent, covering up in light clothing and sleeping under a treated net all help, alongside the yellow fever vaccine, which offers strong, long-lasting protection for those visiting risk areas. A pre-travel consultation can confirm whether the vaccine is right for your itinerary, and whether a Yellow Fever Vaccination Centre visit is required.
Protect Yourself Before You Fly
If you are travelling to a country where yellow fever is present, it is important to plan your protection in advance. Our pharmacist led Travel Clinic in Wembley and Stonebridge can assess your risk, discuss the vaccine and answer any questions about symptoms or eligibility. Book your appointment today and get ready for your trip with the right protection.
Frequently Asked Questions
How soon do yellow fever symptoms appear?
Symptoms usually appear three to six days after being bitten by an infected mosquito, though this can occasionally take longer to develop.
Can yellow fever symptoms come back after I feel better?
Yes. A small proportion of patients feel better after the initial illness, then develop more serious symptoms within 24 hours. Seek help immediately if this happens.
Is there a treatment for yellow fever
There is no specific treatment. Care focuses on rest, fluids and monitoring in hospital if symptoms become severe. Vaccination beforehand remains the best protection.
Who is most at risk of severe yellow fever symptoms?
Anyone unvaccinated who is bitten in a risk area can develop severe disease, though risk varies with age, health and the specific region visited.
Where can I get the yellow fever vaccine near me?
We offer the yellow fever vaccine in Wembley and Stonebridge at our travel clinic. Book an appointment to discuss your travel plans and suitability.