who found the real cause of yellow fever
Yellow fever In 1848, Josiah C. Nott suggested that yellow fever was spread by insects such as moths or mosquitoes, basing his ideas on the pattern of transmission of the disease.[86] Carlos Finlay, a Cuban doctor and scientist, proposed in 1881 that yellow fever might be transmitted by mosquitoes rather than direct human contact.[87][88] Since the losses from yellow fever in the Spanish–American War in the 1890s were extremely high, Army doctors began research experiments with a team led by Walter Reed, and composed of doctors James Carroll, Aristides Agramonte, and Jesse William Lazear. They successfully proved Finlay's ″mosquito hypothesis″. Yellow fever was the first virus shown to be transmitted by mosquitoes. The physician William Gorgas applied these insights and eradicated yellow fever from Havana. He also campaigned against yellow fever during the construction of the Panama Canal. A previous effort of canal building by the French had failed (in part due to mortality from the high incidence of yellow fever and malaria, which killed many workers).[10]
Plague of Athens Historians have long tried to identify the disease behind the Plague of Athens. The disease has traditionally been considered an outbreak of the bubonic plague in its many forms, but reconsiderations of the reported symptoms and epidemiology have led scholars to advance alternative explanations. These include typhus, smallpox, measles, and toxic shock syndrome.[10] Based upon striking descriptive similarities with recent outbreaks in Africa, as well as the fact that the Athenian plague itself apparently came from Africa (as Thucydides recorded), Ebola or a related viral hemorrhagic fever has been considered.[11]