Special Report of the Department of Public Health Relativ...
Health, Massachusetts Department of![Special Report of the Department of Public Health Relative to Varieties and Prevalence of Mosquitoes in the Commonwealth](https://support.digitalhusky.com/media/annotations/sorted/300/30058216/CHSBZCOP0330058216.jpg)
Excerpt from Special Report of the Department of Public Health Relative to Varieties and Prevalence of Mosquitoes in the Commonwealth: Under Chapter 14 of the Resolves of 1939, December, 1940During the summer of 1938 there were 269 deaths from encephalomyelitis in horses, and 34 cases of encephalitis with 24 deaths among humans. This was the first time that the disease in humans was recognized as having been caused by the virus of encephalomye...