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What age is best for a child to receive the second dose of MMR vaccine at 4 yrs of age or at 6 years of age or at 12?

"The first vaccine dose is routinely given at 12 to 15 months of age, usually in combination with the measles and mumps vaccines. The combined vaccination is referred to as MMR. The child should not receive the first dose of MMR before 12 months of age. Before that, the baby still has some of its mother's antibodies, which can interfere with the vaccine and keep it from working. A second dose of MMR is given at either age 4 to 6 years or 11 to 12 years. At least 12 states now require administration of the second MMR dose before children enter kindergarten. "


Asked by Anonymous at 4:37 AM on Apr. 28, 2010 in Preschoolers (3-4)

This question is closed.
Answers (19)
  • I always say the older the better...but the govt says different

    Answer by Anonymous at 7:24 AM on Apr. 28, 2010

  • The second dose of MMR may be given as early as a month after the first dose, and be counted as a valid dose if both doses were given after the first birthday. It is convenient to give the second dose at school entry, since the child will have an immunization visit for other school entry vaccines. The risk of measles is higher in school-age children than those of preschool age, so it is important to receive the second dose by school entry. The second dose is not a "booster"; it is intended to produce immunity in the small number of persons who fail to respond to the first dose.


    Answer by Anonymous at 4:42 AM on Apr. 28, 2010

  • If unsure you could ask the doctor to perform a blood titer.

    Answer by Anonymous at 4:44 AM on Apr. 28, 2010

  • Four years of age.

    Answer by Anonymous at 4:48 AM on Apr. 28, 2010

  • Severe adverse effects may include:

    • Allergic reaction (less than 1 per million)

    • Long-term seizure, brain damage, or deafness (so rare that the association with the vaccine is questionable)


    Answer by Anonymous at 4:54 AM on Apr. 28, 2010


    If the child is ill with something more serious than just a cold, immunization may be delayed. Tell your health care providers if your child had any problems with the first MMR vaccine before scheduling the second one.

    The MMR vaccine should not be given to people who have:

    * An allergy to gelatin or the antibiotic neomycin serious enough to require medical treatment
    * A weakened immune system due to certain cancers, HIV, steroid drugs, chemotherapy, radiation therapy, or other immunosuppressant drugs

    You should not receive this vaccine if you are pregnant or planning to become pregnant within the next 3 months.

    People who have received transfusions or other blood products (including gamma globulin) or who have had low platelet counts should discuss the proper timing of MMR vaccine with their health care provider.

    Answer by Anonymous at 4:55 AM on Apr. 28, 2010


    * You aren't sure if the MMR vaccine should be given, withheld, or delayed for a specific person
    * You have moderate or serious symptoms after receiving the vaccine
    * Other symptoms, not commonly associated with possible side effects of the MMR vaccine, develop
    * You have any other questions or concerns related to the vaccine

    Answer by Anonymous at 4:56 AM on Apr. 28, 2010

  • Central nervous system disturbances, such as encephalitis, have been reported with a frequency of less than one per 1 million doses of MMR vaccination administered, a frequency many times lower than the incidence of serious central nervous system disorders that follow natural infection at a rate of one per 800.

    American Academy of Pediatrics.


    Answer by Anonymous at 4:59 AM on Apr. 28, 2010

  • So if a child is vaccinated to prevent encephalitis which it is caused by measles're telling me that the vaccine could actually caused the disease???? But then again the probability is 1 in a million.

    Answer by Anonymous at 5:04 AM on Apr. 28, 2010

  • Separate administration of each vaccine is also a recommendation.

    Answer by Anonymous at 5:07 AM on Apr. 28, 2010