Yellow fever is a viral infection transmitted by the bite of the female Aedes aegypti mosquito (among others), a daytime feeder identical to the mosquito that transmits Dengue. Fortunately, the use of the long-lasting, highly protective yellow fever vaccine has eliminated almost all of the disease in humans.

Vaccination

Immunization against yellow fever consists of a single-dose, attenuated virus vaccine, producing immunity approximately 100% for 10 years. After immunization, the International Certificate of Vaccination is valid for that period. Booster doses are given every 10 years to revalidate the certificate.

Remember, a completed, signed, validated International Certificate of Vaccination for Yellow Fever is required for entry into certain countries. If there is a specific contraindication to the vaccination, your physician must give you a waiver before travel. Refer to Insect Protection Measures.