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ProQuad®

Merck Sharp & Dohme LLC · FDA-approved active Biologic

ProQuad is a live attenuated combination vaccine that stimulates immune response against measles, mumps, rubella, and varicella viruses.

ProQuad is a live attenuated combination vaccine that stimulates immune response against measles, mumps, rubella, and varicella viruses. Used for Prevention of measles, mumps, rubella, and varicella in children aged 12 months and older.

At a glance

Generic nameProQuad®
SponsorMerck Sharp & Dohme LLC
Drug classLive attenuated combination vaccine
ModalityBiologic
Therapeutic areaImmunology / Infectious Disease
PhaseFDA-approved

Mechanism of action

ProQuad contains weakened (attenuated) strains of measles, mumps, rubella, and varicella-zoster viruses. When administered, these live vaccine viruses replicate in the body at a limited level, triggering both humoral and cell-mediated immune responses that generate protective antibodies and cellular immunity against all four diseases without causing the actual diseases.

Approved indications

Common side effects

Key clinical trials

Primary sources

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SourceUsed for
ClinicalTrials.govTrial enrolment, design, endpoints, results