A vaccine taken orally to immunize a person against polio; Salk vaccine.
An oral vaccine against poliomyelitis, consisting of weak live polio virus.
Oral vaccine, consisting of live but attenuated (weakened) poliovirus, given to provide immunity to poliomyelitis, as part of the recommended immunization schedule for infants, usually in two or three doses before the age of 6 months and added doses at 18 months and at 4 or 5 years; also called oral poliovirus vaccine (OPV) and trivalent live oral poliomyelitis vaccine (TOPV) (compare salk vaccine).
An oral vaccine against poliomyelitis, prepared by culture of the virus under special conditions so that it loses its virulence (i.e. it becomes attenuated) but retains its ability to stimulate antibody production.
Introduced in 1962, the attenuated live oral vaccine (Sabin) against poliomyelitis replaced the previous inactivated vaccine introduced in 1956. It was discontinued in the UK in 2004.