The first annual medical meeting of the National Foundation for Infantile Paralysis was held in New York early in November 1940.1 This meeting was attended by members of the medical advisory committees, the grantees of the foundation, and the board of trustees. Reports on several studies on poliomyelitis virus were made by various investigations supported by the foundation. Virus infected material obtained from the spinal cords of monkeys has been concentrated so that the infection can be produced in dilution of one part to ten million. Studies of the purified and concentrated virus led one investigator to conclude that the virus is protein in nature or contains protein material. Poliomyelitis virus has been found in stools of patients, in contacts and in sewage collected from epidemic areas. Healthy carriers have been found in institutional outbreaks. Attempts to produce infection with poliomyelitis virus in animals ether than the monkey have
Miscellany. JAMA. 1941;116(5):435. doi:10.1001/jama.1941.02820050079025
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