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Yellow fever regularly occurs (is endemic) in several countries in Africa. Vaccination is recommended for most travelers aged 9 months and older traveling to areas at risk for yellow fever. Areas with Risk of Yellow Fever in Africa
The virus is endemic in tropical areas of Africa and Central and South America. 27 countries are at highest risk for yellow fever epidemics in Africa. The burden of yellow fever in Africa is estimated at 84,000–170,000 severe cases and 29,000–60,000 deaths annually.
- Overview
- Symptoms
- Diagnosis
- Prevention
- Who Response
Yellow fever is an epidemic-prone mosquito-borne vaccine preventable disease that is transmitted to humans by the bites of infected mosquitoes. Yellow fever is caused by an arbovirus (a virus transmitted by vectors such mosquitoes, ticks or other arthropods) transmitted to humans by the bites of infected Aedes and Haemagogusmosquitoes. These day-bi...
The incubation period for yellow fever is 3 to 6 days. Many people do not experience symptoms. Common symptoms include fever, muscle pain, headache, loss of appetite, nausea or vomiting. In most cases, symptoms disappear after 3 to 4 days. A small percentage of patients enter a second, more toxic phase within 24 hours of recovering from initial sym...
Yellow fever is difficult to diagnose, especially during the early stages. A more severe case can be confused with malaria, leptospirosis, viral hepatitis, other haemorrhagic fevers, infection with other flaviviruses (such as dengue), and poisoning. Polymerase chain reaction (PCR) testing in blood can sometimes detect the virus in early stages of t...
1. Vaccination Vaccination is the most important means of preventing yellow fever. The yellow fever vaccine is safe, affordable and a single dose provides life-long protection against yellow fever disease. A booster dose of yellow fever vaccine is not needed. The vaccine provides effective immunity within 10 days for 80–100% of people vaccinated, a...
The Eliminate Yellow Fever Epidemics (EYE) Strategy was developed in response to two urban yellow fever outbreaks – in Luanda (Angola) and Kinshasa (Democratic Republic of the Congo), with international exportation to other countries, including China, showing that yellow fever poses a serious global threat requiring new strategic thinking. The EYE ...
20 de mar. de 2024 · Situation at a glance. Since the beginning of 2023, and as of 25 February 2024, a total of 13 countries in the WHO African Region have documented probable and confirmed cases of yellow fever (YF), namely Burkina Faso, Cameroon, the Central African Republic, Chad, Republic of the Congo, Côte d’Ivoire, the Democratic Republic of the ...
In 2022, 12 countries in the WHO African Region have reported confirmed cases of yellow fever (Cameroon, the Central African Republic, Chad, Côte d'Ivoire, the Democratic Republic of the Congo, Ghana, Kenya, Niger, Nigeria, the Republic of the Congo, Sierra Leone and Uganda).
23 de out. de 2021 · We carried out this systematic review with the objective of estimating the incidence and associated mortality of yellow fever in Africa. We found 12 studies from eight countries in Africa, suggesting that studies are scarce in yellow fever-endemic African countries.
1 de set. de 2023 · In 2022, cases of yellow fever (YF) were identified over a wide geographical area in Africa, covering 14 countries,1 and widespread virus circulation with occa-sional spill-over to humans continued in the Americas (Maps 1 and 2).
