Human trials of Sabin's vaccine began in 1957, and in 1958 it was selected, in competition with the live vaccines of Koprowski and other researchers, by the US National Institutes of Health.
Os ensaios clínicos con persoas para a vacina de Sabin comezaron no ano 1957, e en 1958 foi seleccionada, en competición coas vacinas de Koprowski e outros investigadores, polos Institutos Nacionais da Saúde dos Estados Unidos.