Yellow fever vaccine is a vaccine that protects against yellow fever, a viral infection that occurs in Africa and South America, and is made from a weakened form of the yellow fever virus. Most people begin developing immunity within ten days of vaccination and are 99 percent protected within one month, an effect that appears to be lifelong, so additional doses after the first are generally not needed. The World Health Organization recommends routine immunization between nine and twelve months of age in countries where the disease is common, as well as immunization of travelers to those areas, and some countries require a yellow fever vaccination certificate before entry from a country where the disease is common. The vaccine came into use in 1938 and is on the World Health Organization's List of Essential Medicines.
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1. Wikipedia
Wikipedia contributors, Wikimedia FoundationLead section
Yellow fever vaccine came into use in 1938.
https://en.wikipedia.org/wiki/Yellow_fever_vaccine, lead section
Yellow fever vaccine is a vaccine that protects against yellow fever.
View the Source Frequently Asked Questions
Does the yellow fever vaccine need a booster dose?
No booster is needed for most people; about 99% are protected within a month.
For most people, the vaccine remains effective permanently. A booster dose of yellow fever vaccine ten years after a primary dose is not necessary. Most people begin to develop immunity within ten days of vaccination and are 99% protected within one month.
Who should not receive the yellow fever vaccine?
Infants under six months and people with immune or thymus disorders.
The 17D vaccine is contraindicated in, among others, infants between zero and six months, people with thymus disorders associated with abnormal immune cell function, people with primary immunodeficiencies, and anyone with a diminished immune capacity. This record describes what the sources state and is not medical advice.
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