[The forerunners of Salk].
D007159:Immunologic Tests; D011051:Poliomyelitis; D017955:Poliovirus / Q000208:ethnology*; D012107:Research Design; D046509:Tissue Culture Techniques; D014780:Viruses / Q000208:ethnology*
POLIOMYELITIS VIRUS/culture; TISSUE CULTURE; VIRUSES/culture
SALK-VAKSINENS fedre.