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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.
Injection versus nasal spray. Flu vaccines are available either as. a trivalent or quadrivalent injection (TIV or QIV), which contains the inactivated form of the virus. a nasal spray of live attenuated influenza vaccine (LAIV, Q/LAIV), which contains the attenuated or weakened form of the virus.