The development of variants of HeLa cells possessing resistance against the cytopathogenic effect of ECHO viruses.
D029822:Enterovirus B, Human; D006367:HeLa Cells; D006801:Humans; D007159:Immunologic Tests; D046509:Tissue Culture Techniques; D014780:Viruses / Q000208:ethnology*
TISSUE CULTURE; VIRUSES/culture