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CDC advisory panel recommends restricting access to MMRV vax

By NBC News  
   September 19, 2025

A closely watched advisory panel to the CDC voted Thursday to tweak recommendations for a measles vaccine that includes protection against the varicella, or chickenpox, virus. The new guidance from the CDC's Advisory Committee on Immunization Practices (ACIP) suggests that MMRV, shouldn't be recommended for children under age 4 because of a small risk for febrile seizures in that age group. The seizures can be prompted by fevers associated with viruses or, sometimes, vaccines. They usually last for a few minutes and, while they are scary for parents to witness, are generally harmless, doctors say.

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