The efficacy of the components of the previous formulation of the measles, mumps, and rubella vaccine manufactured by Merck & Co., Inc. was established in a series of double-blind controlled field trials, which demonstrated a high degree of protective efficacy afforded by the individual vaccine components.
Učinkovitost komponent prejšnjega cepiva proti ošpicam, mumpsu in rdečkam proizvajalca Merck & Co., Inc., je bila dokazana v seriji dvojno slepih, kontroliranih področnih študij, ki so dokazale visoko stopnjo učinkovitosti zaščite posameznih komponent cepiva. V teh študijah je bila serokonverzija kot