1900 (Dec)-1901 (Feb)

In Cuba, testing of Finlay’s theory of mosquito transmission of yellow fever at experimental camp (Camp Lazear) in which volunteers, mostly men in their 20s quarantined 24 days prior to study, assigned to “Infected Mosquito Building” or “Infected Clothing Building,” the latter tightly enclosed to prevent mosquitoes or fresh air from entering. First yellow fever case developed on 9 December and others followed, whereas men in the room free of mosquitoes remained healthy. On 15 December, Walter Reed cabled Army SG Sternberg, “’Experimental station established November 20, three cases already diagnosed, confirmed by Guilteras, Finlay, Albertini and Gorgas, theory conclusively proven.” (Byerly I, 100-103).