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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.
The nasal spray vaccine contains a live attenuated flu virus, but the virus is weakened so that it cannot cause the flu. The viruses in the nasal spray can't replicate in the warm temperatures of the lungs and other parts in the body.rivalent flu vaccines protect against two influenza A strains, H1N1 and H3N2, and one influenza B strain. Quadrivalent flu vaccines â offered for the first time in the 2013-2014 flu season â protect against the same strains as the trivalent vaccine, as well as an extra influenza B virus.