ProQuad (measles mumps rubella varicella vaccine live) * is a combined attenuated live virus vaccine containing measles, mumps, rubella, and varicella viruses. ProQuad (measles mumps rubella varicella vaccine live) is a sterile lyophilized preparation of (1) the components of M-M-R*ll (Measles, Mumps and Rubella Virus Vaccine Live): Measles Virus Vaccine Live, a more attenuated line of measles virus, derived from Enders' attenuated Edmonston strain and propagated in chick embryo cell culture; Mumps Virus Vaccine Live, the Jeryl Lynn™ (B level) strain of mumps vims propagated in chick embryo cell culture; Rubella Virus Vaccine Live, the Wistar RA 27/3 strain of live attenuated rubella virus propagated in WI-38 human diploid lung fibroblasts; and (2) Varicella Virus Vaccine Live (Oka/Merck), the Oka/Merck strain of varicella-zoster virus propagated in MRC-5 cells. The cells, virus pools, bovine serum, and human albumin used in manufacturing are all tested to provide assurance that the final product is free of potential adventitious agents.

M-M-R II (Measles, Mumps, and Rubella Virus Vaccine Live) is a live virus vaccine for vaccination against measles (rubeola), mumps, and rubella (German measles).

MSTA®, Mumps Skin Test Antigen, is a sterile suspension of killed mumps virus for intradermal use. It is prepared from the extraembryonic fluid of the virus-infected chicken embryo and is concentrated and purified by differential centrifugation. The virus is killed with formaldehyde solution, 1:1000, and is then diluted with isotonic sodium chloride solution. The resultant product contains approximately 0.012 molar glycine and less than 1:8,000 formaldehyde solution. Thimerosal (mercury derivative) 1:10,000 is added as a preservative. The skin test antigen is formulated to contain at least 40 complement fixing units (CFU) per mL, at the time of release, as determined by the Complement-Fixation Test. This product, after shaking, is slightly opalescent in color.

MUMPSVAX* (Mumps Virus Vaccine Live) is a live virus vaccine for vaccination against mumps.