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In 1936, Albert Sabin & Peter Olitsky cultured poliovirus in embryonic nervous cells. In 1949, John Enders, Thomas Weller & Frederick C. Robbins grew the virus in muscle cells (fibroblasts) human embryonic skin cells, connective tissue cells, intestine and nervous cells, winning the Nóbel prize in 1954. The important production point is that the virus grows in nonnervous cells.