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MMR-II

FDA Approved: 1978

Vaccine Type(s)

MMR

What you can expect

These are the most commonly reported short-term reactions based on the manufacturer's official package insert.

⚠️ Limited data — rates may not fully reflect real-world experience

Fever

Low frequency

Reported in source

Headache

Low frequency

Reported in source

Malaise

Low frequency

Reported in source

Irritability

Low frequency

Reported in source

Diarrhea

Low frequency

Reported in source

Vomiting

Low frequency

Reported in source

Nausea

Low frequency

Reported in source

Arthritis

Low frequency

Reported in source

Arthralgia

Low frequency

Reported in source

Myalgia

Low frequency

Reported in source

Febrile seizures

Low frequency

Reported in source

Afebrile seizures

Low frequency

Reported in source

Guillain-Barre syndrome

Low frequency

Reported in source

Acute disseminated encephalomyelitis

Low frequency

Reported in source

Transverse myelitis

Low frequency

Reported in source

Encephalitis

Low frequency

Reported in source

Encephalopathy

Low frequency

Reported in source

Subacute sclerosing panencephalitis

Low frequency

Reported in source

Pneumonia

Low frequency

Reported in source

Pneumonitis

Low frequency

Reported in source

Rash

Low frequency

Reported in source

Injection site reactions

Low frequency

Reported in source

Urticaria

Low frequency

Reported in source

Anaphylaxis

Low frequency

Reported in source

Angioedema

Low frequency

Reported in source

Thrombocytopenia

Low frequency

Reported in source

Purpura

Low frequency

Reported in source

Vasculitis

Low frequency

Reported in source

Orchitis

Low frequency

Reported in source

Source: FDA-approved package insert

See the Full Picture

Knowing what’s common is just the start.

  • Compare reactions across brands
  • See what shows up when vaccines are given together
  • Understand what that means for you or your family