Yellow fever

Yellow fever is an infectious disease, prevalent in tropical and subtropical regions and is caused by a virus. The virus is transmitted by tropical mosquitoes. An outbreak of this disease always happens through the yellow fever mosquito (Aedes aegypti). The disease occurs only in certain tropical regions of Africa and South America. Infection typically leads to a mild, flu-like illness, but approximately 10% of patients may develop severe complications.

Where is yellow fever found?

Yellow fever occurs in tropical areas of Africa and South America, both in cities and in rainforest regions.

What are the symptoms?

Symptoms may appear three to six days after infection and can include:

Flu-like feelings
Fever with chills
Nausea
Muscle pain
Back pain
Headache
General feeling of being unwell

How can yellow fever be prevented?

Vaccination is the only effective way to be fully protected against yellow fever. The vaccine is administered via injection in the upper arm and in most cases provides lifelong protection. Sometimes lifelong protection does not apply, in which case we recommend a booster vaccination. Protection begins 10 days after vaccination. The vaccine can be given to children. However, it is advised not to administer it to children under 9 months of age or to pregnant women.

Strict controls

Several countries require proof of vaccination, even after a layover in a country where yellow fever is present. It is crucial to be aware of this requirement! To avoid issues at the border, check the current status of yellow fever advice for each country you visit. KLM Health Services can provide further information. It is wise to verify this well in advance of your departure. Some countries set a 10-day waiting period after vaccination before allowing entry. Last-minute vaccination will not be effective in this situation.