Abstract
THE 'HE first human infection with one of the viruo A of equine encephalomyelitis was recognized in Massachusetts in the summer of 1938, the virus work having been done by Fothergill, Dingle and Connerley1 (on 1 case) and Webster and Wright2 (on the same case and 4 others) using material from fatal cases furnished to them by Feemster,3 who was carrying on the epidemiologic investigation. The equine viruses had been isolated previously from horses, the western virus by Meyer, Haring and Howitt4 in 1930, the eastern virus by Ten Broeck and his associates5 in 1933, and the Venezuelan virus by . . .