{"id":"mr-or-m-m-r-ii-vaccine","safety":{"commonSideEffects":[{"rate":"5-15","effect":"Fever"},{"rate":"5","effect":"Rash"},{"rate":"20-30","effect":"Local injection site reactions (pain, erythema, swelling)"},{"rate":"1","effect":"Parotitis"},{"rate":"1-3","effect":"Arthralgia or arthritis"}]},"_chembl":{"chemblId":"CHEMBL5483039","moleculeType":null,"molecularWeight":"393.02"},"_dailymed":null,"mechanism":{"_ai_source":"claude-haiku-4.5","explanation":"The vaccine contains weakened (attenuated) strains of measles, mumps, and rubella viruses that trigger both humoral and cell-mediated immune responses without causing disease. Upon vaccination, the immune system produces antibodies and memory cells against these three viral pathogens, providing long-term protection against natural infection.","oneSentence":"M-M-R II is a live attenuated vaccine that stimulates immune response against measles, mumps, and rubella viruses.","_ai_confidence":"high"},"_scrapedAt":"2026-03-28T01:22:08.341Z","_scrapedBy":"cloudflare-swarm","_wikipedia":null,"indications":{"approved":[{"name":"Prevention of measles, mumps, and rubella in children and adults"}]},"trialDetails":[{"nctId":"NCT04333732","phase":"PHASE3","title":"CROWN CORONATION: COVID-19 Research Outcomes Worldwide Network for CORONAvirus prevenTION","status":"COMPLETED","sponsor":"Washington University School of Medicine","startDate":"2020-09-04","conditions":"COVID 19","enrollment":3411}],"_emaApprovals":[],"_faersSignals":[],"_approvalHistory":[],"publicationCount":0,"rwe":[],"genericFilers":[],"relatedDrugs":[],"labelChanges":[],"biosimilarFilings":[],"pricing":[],"formularyStatus":[],"manufacturing":[],"companionDiagnostics":[],"competitors":[],"timeline":[],"patents":[],"ownershipHistory":[],"trials":[],"biosimilars":[],"latestUpdates":[],"references":[],"tags":[],"ecosystem":[],"genericManufacturerList":[],"offLabel":[],"developmentCodes":[],"aliases":["Merck"],"phase":"phase_3","status":"active","brandName":"MR or M-M-R II ® vaccine","genericName":"MR or M-M-R II ® vaccine","companyName":"Washington University School of Medicine","companyId":"washington-university-school-of-medicine","modality":"Small molecule","firstApprovalDate":"","aiSummary":"M-M-R II is a live attenuated vaccine that stimulates immune response against measles, mumps, and rubella viruses. Used for Prevention of measles, mumps, and rubella in children and adults.","enrichmentLevel":3,"visitCount":0,"trialStats":{"total":1,"withResults":1},"verificationStatus":"verified","dataCompleteness":{"mechanism":true,"indications":true,"safety":true,"trials":true,"score":4}}