U.S. National Institutes of Health

Illustration of Stegomyia fasciata (now known as Aedes aegypti) in Mosquitoes: How They Live; How They Carry Disease; How They Are Classified; How They May Be Destroyed, Leland Ossian Howard, New York, 1901

Courtesy National Library of Medicine

The Aedes aegypti mosquito transmits yellow fever, a fact not known to doctors in 1793 Philadelphia.