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Malaria - and its cousin, yellow fever - had significant implications during the war and the debilitating consequences of the disease were already certain before the Civil War had started in earnest and well before its final history had been written.
Yellow fever is caused by a virus that is spread by several species of Aedes and Haemogus mosquitoes. Infection causes disease, with symptoms ranging from a mild flu to severe illness, including high fever, severe headache, muscle pain, jaundice, and vomiting of a liquefied black putrid matter.It is the pronounced yellow skin and eye color of severe jaundice that gives rise to the name yellow fever.ellow fever got its name because of the severe jaundice that is a symptom of the diseaseâit causes pronounced yellow skin and eye color. At one time it was called âBlack Vomitâ because of the characteristic black putrid vomit it produces.