Mosquitoes spread yellow fever virus. Illness is very rare in U.S. travelers but can be severe.
Protect yourself from mosquito bites when traveling to areas at risk for yellow fever.
Symptoms of yellow fever include fever, chills, aches, yellowing skin and eyes, and more.
Infected mosquitoes spread yellow fever virus in parts of Africa and South America.
Yellow fever regularly occurs across central Africa.
Yellow fever regularly occurs in several South American countries.
Yellow fever vaccine is recommended for most U.S. travelers to parts of Africa and South America.
For Professionals
Proof of vaccination or a waiver is often required for U.S. travelers to endemic areas.
Yellow fever can present as mild febrile illness or severe, sometimes fatal disease.
No medicines are available to treat yellow fever; some drugs should be avoided. Care is supportive.