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.
Yellow fever - World Health Organization (WHO)
2023年11月8日 · Yellow 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)
2017年3月2日 · 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 - number of reported cases - World Health …
Confirmed yellow fever cases, including those confirmed clinically, epidemiologically, or by laboratory investigation. Cases that have been discarded following laboratory investigation should not be included.
Yellow fever
2023年8月2日 · Vaccination is the most important measure for preventing yellow fever. Yellow fever vaccine is safe, affordable, and a single dose provides life-long protection against yellow fever disease. The yellow fever vaccine provides immunity within one week in 95% of people vaccinated. A booster dose is not needed. Yellow fever vaccination is carried ...
Yellow fever - East, West, and Central Africa
2021年12月23日 · Yellow fever is endemic in the WHO African Region and was among the top five most frequently reported events in the region in 2019 and 2020. Twenty-seven countries in Africa have been classified as high-risk by the Eliminate Yellow fever Epidemics (EYE) global strategy. From 1 January 2021 to 26 August 2022, a total of 12 countries in the region have …
Lifetime validity of one dose of Yellow fever vaccine
2014年5月24日 · Lifetime validity of one dose of Yellow fever vaccine. Amendment to Annex 7 of IHR (2005) 24 May 2014
Countries with risk of yellow fever transmission and countries ...
2022年11月18日 · Overview . The Country List is a compilation of key information to facilitate international travel. The information provided for each country includes vaccination requirements for international travellers as provided by States Parties to the International Health Regulations (2005) (IHR), as well as WHO recommendations for vaccination against yellow fever, …
Yellow fever - Kenya - World Health Organization (WHO)
During the period 12 January to 15 March 2022, a total of 53 suspected yellow fever cases, including six deaths, have been reported from Isiolo county, central Kenya. Two samples tested positive by RT-PCR and six were positive by ELISA, indicating probable yellow fever cases. The last reported yellow fever outbreak in Kenya was in 2011. WHO assesses the public health …
Yellow fever- East, West and Central Africa region
2023年1月3日 · This is an update on the yellow fever situation in the WHO African Region since the last disease outbreak news was published on 2 September 2022. From 1 January 2021 to 7 December 2022, a total of 203 confirmed and 252 probable cases with 40 deaths (Case Fatality Ratio 9%) were reported to WHO from 13 countries in the WHO African Region. Risk factors …