ProQuad opnår antistofreaktioner mod mæslinger, fåresyge og røde hunde svarende til reaktionerne efter vaccination med MFR- vaccinen fremstillet af Merck & Co., Inc.
ProQuad elicits rates of antibody responses against measles, mumps, and rubella similar to those observed after vaccination with the measles, mumps, and rubella vaccine manufactured by Merck & Co., Inc.