Stanford Travel Clinic

Yellow Fever Vaccination

Contact Information

Stanford Travel Clinic
900 Blake Wilbur Drive
Palo Alto, CA 94034
Phone: (650) 736-5700
Scheduling Hours
Monday - Friday
8:30am - 5:00pm
Travel Clinic Hours
8:30am - 12:00pm

Yellow fever vaccinations are available from the Travel Clinic at Stanford Hospital & Clinics.

Because transmission of yellow fever no longer occurs within the United States, it is important for travelers to talk with their health care providers about the need to be immunized with the yellow fever vaccination prior to visiting areas where yellow fever still exists.

Although it is a rare disease, many countries require that visitors have the yellow fever vaccination prior to entering the country.

How is yellow fever transmitted?

Yellow fever is a viral disease that is transmitted by Aedes spp. mosquitoes

Generally, yellow fever is transmitted only in certain areas of Africa and South America. In South America (especially Brazil), infections occur sporadically, and usually among forestry and agricultural workers. In Africa, infections occur primarily in the tropical areas of western and central Africa, but also in urban locations as well as jungle regions.

What are the symptoms of yellow fever?

Although patients should consult a doctor for diagnosis, the following are the most common symptoms of yellow fever. However, each individual may experience symptoms differently.

Symptoms may include:

Symptoms usually occur within three to six days after exposure. The symptoms of yellow fever may resemble other conditions or medical problems, although a minority of patients infected with yellow fever progress to severe disease (liver or kidney failure, severe bleeding). The disease carries a high mortality rate among those who develop severe disease.

What is the treatment for yellow fever?

No specific treatment exists for yellow fever, which is one reason that preventative measures such as vaccination are so important. Supportive treatment is aimed at controlling the symptoms, and includes rest, fluids, and use of medicines to help relieve fever and aching. Certain medications should be avoided, such as aspirin or nonsteroidal anti-inflammatory drugs, which may increase the risk for bleeding. People with yellow fever should be protected from further mosquito exposure (for example, they should stay indoors or under a mosquito net) during the first few days of illness, so they do not contribute to the disease transmission cycle.

It is believed that people who have had yellow fever develop lifelong immunity

How is Yellow Fever Prevented?

The avoidance of mosquito bites (use of insect repellant, wearing proper clothing, etc.) is among the most important of measures to prevent infection with yellow fever. To learn more about insect avoidance, please visit

An effective vaccine also exists to prevent yellow fever. Yellow fever vaccine is a live-virus vaccine, and a single dose protects against disease for 10 years or more. If a person is at continued risk of infection, a booster dose is recommended every 10 years.

Yellow fever vaccine is recommended for persons aged 9 months or older who are traveling to (or living in) areas at risk for yellow fever virus transmission in South America and Africa. Some countries require individuals entering their borders to display a valid International Certificate of Vaccination or Prophylaxis, documenting their receipt of the yellow fever vaccine. Yellow fever vaccination requirements and recommendations for specific countries are available at:

Serious adverse events can occur following yellow fever vaccination. Therefore, persons should only be vaccinated if they are at risk of exposure to yellow fever virus or require proof of vaccination for country entry. Individuals considering yellow fever vaccination should discuss their underlying health conditions with their health care provider. A medical waiver can be given for persons with a precaution or contraindication to vaccination. Among those persons who should not receive yellow fever vaccine (contraindications) are individuals who have:

In addition, the vaccine should be given with caution and only after carefully considering the potential risks and benefits (precautions) for those who are:

This vaccine is administered only at designated vaccination centers. Stanford Travel Clinic is a designated yellow fever vaccination center.

To learn more about Yellow Fever vaccination please visit:

Stanford Medicine Resources:

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