Short answers, pulled from the story.
The first definitive outbreak of yellow fever in the New World occurred on the island of Barbados in 1647. This event marked the beginning of a centuries-long terror that would reshape the Americas.
Carlos Finlay, a Cuban-Spanish doctor and scientist, proposed that the disease was transmitted by a specific mosquito in 1881. A team led by Walter Reed in 1900 successfully proved that the Aedes aegypti mosquito was the vector.
The yellow fever virus became the first human virus to be isolated in 1927 in West Africa. Max Theiler led the completion of the 17D yellow fever vaccine in 1937, for which he was awarded the Nobel Prize in Physiology or Medicine.
William Gorgas launched a massive sanitation campaign in 1904 to eradicate the Aedes aegypti mosquito from the area. His methods included spraying insecticides, eliminating breeding sites, and improving drainage, which transformed the swampy conditions into a habitable zone for workers.
Yellow fever persists in a sylvatic cycle involving wild primates and forest-dwelling mosquitoes, making eradication impossible without eliminating all vectors. The disease circulates among nonhuman primates and mosquitoes of the genus Haemagogus and Sabethes in South America and the genus Aedes in Africa.
The first appearance of the disease in Asia in recorded history occurred in March and April 2016. During this time, 11 imported cases of the Angola genotype in unvaccinated Chinese nationals were reported in China.