Control of measles through active immunization has been the object of numerous studies. Measles first was transmitted artificially to susceptible human beings by Home,1 who exposed scarified skin of volunteers to blood from patients in the acute phase of this disease. In a similar attempt to produce active immunity, Hektoen2 injected fresh infective blood subcutaneously into susceptible persons who subsequently developed measles. Failure to produce attenuated disease apparently discouraged further attempts to induce active immunity against measles. Adaptation of measles virus to growth in embryonated hen's egg and the subsequent use of this virus as an immunizing agent was reported by Rake and his associates between 1939 and 1943.3-8 Virus passaged from 4 to 108 times via the chorioallantoic route did not induce in susceptible children a significant degree of protection from naturally occurring measles,9 and interest in this problem again waned.In 1954, Enders
McCRUMB FR, KRESS S, SAUNDERS E, SNYDER MJ, SCHLUEDERBERG AE. Studies with Live Attenuated Measles-Virus Vaccine: I. Clinical and Immunologic Responses in Institutionalized Children. Am J Dis Child. 1961;101(6):689–700. doi:10.1001/archpedi.1961.04020070003003
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