N'oge na-adịghị anya mgbe ọgwụ mgbochi Salk nwetara ikike na 1955, a malitere ịgba ọgwụ mgbochi ụmụaka. Na US, na-esote mkpọsa ịgba ọgwụ mgbochi ọrịa nke March of Dimes kwalitere, ọnụ ọgụgụ nke ọrịa polio kwa afọ dara site na 35,000 na 1953 ruo 5,600 site na 1957. Site na 1961 ọ bụ naanị ikpe 161 ka edere na United States. Otu izu tupu mgbe ahụ na Eprel 1955, Pierre Lépine na Pasteur Institute na Paris kwupụtakwara ọgwụ mgbochi polio dị irè Ajụjụ: Kedu ọgwụ mgbochi nke nyere aka kpochapụ ọrịa ahụ?
ọrịa polio