Yellow fever is located only in Africa and South America. An indication of yellow fever infection is that the high fever is associated with a relatively slow pulse. Half of these patients in the toxic phase die within 10-14 days. A yellow fever vaccine is available and should be taken by travelers to endemic areas. It is a safe, effective live virus vaccine that has been used for several decades and confers immunity for 10 years or more.
Side effects occur in very few vaccinees.
Because the virus is transmitted by mosquitos, effective protection against mosquitos results in effective potection against yellow fever. This includes the use of insect repellant, protective clothing, and mosquito netting.