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Yellow fever. Yellow fever is a viral disease of typically short duration. [3] In most cases, symptoms include fever, chills, loss of appetite, nausea, muscle pains—particularly in the back—and headaches. [3] Symptoms typically improve within five days. [3] In about 15% of people, within a day of improving the fever comes back, abdominal ...
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The outbreak of yellow fever in Barcelona in 1821. The evolutionary origins of yellow fever most likely came from Africa. Phylogenetic analyses indicate that the virus originated from East or Central Africa, with transmission between primates and humans, and spread from there to West Africa.
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Yellow fever is an endemic (common) disease in tropical zones of Africa, Central America and South America, and it represents a risk for travellers who go to these areas. There are around 200,000 cases of yellow fever every year around the world, which cause around 30,000 deaths. Distribution of Yellow Fever.
6 days ago · Yellow fever, acute infectious disease characterized by fever, headache, backache, nausea, and vomiting. The skin and eyes may appear yellow, a condition known as jaundice, giving rise to the disease’s popular name. Yellow fever is caused by a flavivirus. Learn more about its transmission, treatment, and history.
- The Editors of Encyclopaedia Britannica
May 31, 2023 · Español. Key facts. 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.
The yellow fever epidemic occurred during late 1870, beginning in August to the end of the year. There were a total of 1235 deaths; 468 women and 767 men. [1] The epidemic ended due to the city following hygienic measures and the mosquitoes not surviving Barcelona's cold weather conditions in December 1870. [1]
Nov 8, 2023 · Overview. Yellow fever is a viral disease that is transmitted to humans by the bites of infected mosquitoes. It is prone to epidemics and is preventable with a vaccine. These day-biting mosquitoes breed around houses (domestic), in forests or jungles (wild), or in both habitats (semi-domestic).