trivalent vaccine meaning
Noun. 1. trivalent live oral poliomyelitis vaccine-an oral vaccine (containing live but weakened poliovirus) that is given to provide immunity to poliomyelitis. OPV, oral poliovirus vaccine, Sabin vaccine, TOPV.poliovirus vaccine-vaccine prepared from poliovirus to provide immunity to poliomyelitis.rivalent live oral poliomyelitis vaccine-definition of trivalent live oral poliomyelitis vaccine by The Free Dictionary.