Disease & Vaccine A–Z

Diseases beginning with Y

U.S.-focused summaries with current official guidance links. For a diagnosis, personal vaccine schedule, pregnancy advice, or urgent symptoms, speak with a qualified clinician.

Yellow Fever

Travel vaccine

Disease

A mosquito-borne viral disease found in parts of Africa and South America.

Symptoms

Fever, headache, body aches, nausea, or vomiting; severe illness can cause jaundice, bleeding, shock, and organ failure.

Typical duration

Symptoms often begin three to six days after infection; severe disease can progress rapidly.

How serious is it?

Severe yellow fever has a high fatality rate and needs urgent hospital care.

Treatment & management

No specific antiviral; treatment is supportive. Aspirin and similar medicines may increase bleeding risk.

Vaccine: who and when?

Product: YF-Vax, a single-dose live vaccine for eligible people age 9 months and older. It should be given at least 10 days before travel; one dose protects most people for life, although selected travelers need a booster or documentation based on destination and individual risk.

Check the current CDC guidance for Yellow Fever →

Cost and access: Patient cost varies by insurance, provider, location, and eligibility. Many recommended vaccines are covered with no out-of-pocket cost under qualifying plans, and eligible children may receive vaccines through the Vaccines for Children program. CDC price lists are purchasing benchmarks—not guaranteed patient prices. CDC price and program context.

Last reviewed against official U.S. sources: September 5, 2026. This page provides general education, not medical advice.