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
Bruce George (Genius Is Common) as Albert Einstein."-Bruce George "It’s imperative that these spoken word artists be catapulted to the mainstream and be recognized. Finally the marriage between hip-hop and spoken word can begin the arduous task of reconciliation." —Bruce George George graduated from Niagara University with a B.A. degree in Psychology. Bruce George is the Founder/Managing Editor of: Bruce George (Genius Is Common) Bruce George is the Co-Founder of the award-winning "Russell Simmons Presents, Def Poetry Jam (HBO)," and the Founder of the rapidly growing "Genius Is Common" Movement. Genius is Common means that all beings have a genius in them... An example can