Overview
Yellow fever is a viral infection spread by mosquito bites in some regions. Many cases are mild, but it can be serious. A vaccine gives strong protection. This is general educational information, not medical advice.
Symptoms
- fever
- headache
- muscle aches
- nausea; jaundice in severe cases
Causes
- infection with the yellow fever virus through mosquito bites
Risk factors
- living in or travelling to affected regions without vaccination
Prevention
- yellow fever vaccination where recommended
- mosquito-bite protection
Emergency warning signs
- jaundice with bleeding
- confusion or drowsiness
- very high persistent fever
Evaluation & tests
Educational note: clinicians use blood tests and travel history to assess yellow fever. This library does not diagnose.
Treatment education
Educational overview: care is supportive and individualized by clinicians; prevention is key. This library does not prescribe.
Self-care
General education: check vaccination requirements before travel to affected areas and protect against mosquito bites.
When to seek care
Seek care for fever after travel to an affected region.