Polio vaccine attenuated vaccine strains. In 1958, the National Institutes of Health created a special committee on live polio vaccines. The various vaccines were carefully evaluated for their ability to induce immunity to polio, while retaining a low incidence of neuropathogenicity in monkeys. Large-scale clinical trials performed in the Soviet Union in late 1950s to early 1960s by Mikhail Chumakov and his colleagues demonstrated safety and high efficacy of the vaccine. Based on these results, the Sabin strains were chosen for worldwide distribution. Fifty-seven nucleotide substitutions distinguish the attenuated Sabin 1 strain from its virulent parent (the Mahoney serotype), two nucleotide substitutions
Sabin Vaccine Institute "childhood cognitive development among the poor, thereby reinforcing poverty." Sabin works with experts and organizations from around the world to advance knowledge of both infectious diseases and the vaccines that can prevent them. Through the International Association of Immunization Managers (IAIM) Network, Sabin arranges international forums to improve the success rates of immunization programs. Sabin serves as the Secretariat for the Coalition against Typhoid whose mission is to raise awareness of Typhoid and Salmonellosis. First awarded in 1994, the Albert B. Sabin Gold Medal is presented by Sabin each year to one or more persons who have made a major