Because of wide-spread vaccination, yellow fever is very rare in the UK, but if you're visiting areas such as sub-Saharan Africa, South America or the Caribbean, you should ask your doctor about any preventative measures you can take.
What are the symptoms for yellow fever?
If you have contracted yellow fever then you may experience two stages of symptoms. Things to look out for from the first stage, according to the NHS, are:
It is thought that for about 50% of people who experience the above, the condition can be fatal.
How is yellow fever spread?
Yellow fever is spread to humans through mosquito bites. It cannot be caught from another human.
The mosquitos who are likely to carry yellow fever are active during the daytime, usually biting through the day. They can be found in both cities and the countryside.
What's the treatment for yellow fever?
There is a vaccination for yellow fever that you should get 10 days before travelling anywhere where a risk of yellow fever is significant. Once you've had the jab, you'll be covered for 10 years and it protects over 95% of people who have it.
Once you've contracted yellow fever there is no medical treatment available, but you can treat the uncomfortable symptoms.
Painkillers can help with a high temperature and muscle pain and you should drink plenty of fluids to keep dehydration at bay.
In some cases patients will be admitted to hospital, so their condition can be monitored. If you have any concerns about yellow fever or related symptoms, you should seek medical advice immediately.