Poliomyelitis
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
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...patients who develop paralytic poliomyelitis, about 25% sustain severe...brain are attacked (bulbar poliomyelitis), causing paralysis of...muscles. The incidence of poliomyelitis declined radically in the...1955. By 1961 the Sabin vaccine, a preparation made from...N Nigeria refused to use vaccines they believed would sterilize...