However, the complete content is accessible to all Web browsers and devices. Yellow Fever Resources Yellow Fever Disease Yellow fever is an acute, viral disease transmitted between humans by infected mosquitoes. The disease affects people of all ages and occurs in tropical areas, mainly in sub-Saharan Africa and parts of South America.
Many infections are mild, but the disease can cause severe, life-threatening illness.
Initial symptoms include high fever, general muscle pain, backache, shivers, headache, loss of appetite, nausea, and vomiting. About half of the patients in this toxic phase die within 10 to 14 days. Persons recovering from yellow fever have lifelong immunity against reinfection. An estimated 200,000 yellow fever cases with 30,000 deaths occur each year, almost all in sub-Saharan Africa where over 460 million people in 33 countries are at risk of infection. There is no specific treatment for yellow fever.