Live attenuated oral poliovirus vaccine: problem areas in production.
D000818:Animals; D000882:Haplorhini; D006801:Humans; D011055:Poliovirus Vaccine, Oral / Q000592:standards* / Q000633:toxicity; D014613:Vaccines, Attenuated / Q000592:standards; D014774:Virulence
D011055:Poliovirus Vaccine, Oral; D014613:Vaccines, Attenuated