MMR Vaccine Side Effects

Although most people do not experience problems with the MMR vaccine, side effects are possible. In clinical studies, the most common reactions included temporary joint pain, mild rash, and fever. If you develop any signs of an allergic reaction after receiving this vaccine, such as itching, swelling of the throat, or difficulty breathing, tell your healthcare provider right away.

An Introduction to MMR Vaccine Side Effects

As with all vaccines, side effects are possible with the MMR vaccine (officially known as M-M-R® II). However, not everyone who receives the vaccine will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are treated easily by you or your healthcare provider.
 
(This article covers many, but not all, of the possible side effects with the MMR vaccine. Your healthcare provider can discuss a more complete list with you.)
 

Common Side Effects of the MMR Vaccine

MMR has been studied thoroughly in clinical trials, during which possible side effects were carefully documented. In addition, side effects reported during actual use of the vaccine, after it was approved, have also been documented.
 
Based on this information, the most common reactions to MMR (or other measles, mumps, or rubella vaccines) include:
 
  • Temporary joint pain or stiffness (mostly in teenage and adult women) -- in up to 1 in 4 people
  • Fever -- up to 1 in 6 people
  • Mild rash -- up to 1 in 20 people.
     
A Dose of Reassurance for Parents of Picky Eaters

MMR Vaccination

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