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Bookmark or Share- Yellow fever - World Health Organization (WHO)Yellow fever is an infectious disease transmitted by mosquitoes that bite mostly during the day. As of 2023, 34 countries in Africa and 13 countries in Central and South America are either endemic for, or have regions that are endemic for, yellow fever. Yellow fever is prevented by a vaccine, which is safe and affordable.
- Four things you should know about Yellow FeverYellow fever is a high-impact, high-threat disease, with a risk of international spread, representing a potential threat to global health security. There are 3 types of transmission cycles: Sylvatic (or jungle) yellow fever spreads when monkeys are bitten by wild mosquitoes that pass the virus on to other monkeys and humans.
- Yellow fever - World Health Organization (WHO)The yellow fever virus is transmitted by infected mosquitoes, most commonly from the Aedes species – the same mosquito that spreads the Zika, Chikungunya and Dengue virus. Haemogogus mosquitoes also spread yellow fever and are mostly found in the jungle. Mosquitoes become infected with the virus when they bite an infected human or monkey.
- Yellow Fever - World Health Organization (WHO)Yellow Fever Yellow fever (YF), caused by a Flavivirus, is transmitted by several species of infected mosquitoes (e.g. Haemogogus and Aedes spp.). The incubation period is usually 4–6 days after an infected mosquito bites the person (Figure 1). The course of infection can be asymptomatic or mild in most infected persons.
- Yellow Fever - World Health Organization (WHO)The YF vaccine is given as a single subcutaneous or intramuscular injection. Some countries require an International Certificate of Vaccination against yellow fever for incoming visitors. Vaccination for this purpose is done in nationally authorized sites using WHO prequalified YF vaccine. Yellow Fever Vaccine Standardization. Written Standards
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