Delayed or absent first dose of measles, mumps, and rubella vaccination

JAMA Network Open

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About The Study:

 In this cohort study of children with regular access to care, most received their measles, mumps, and rubella (MMR) vaccine on time, but the proportion not receiving the MMR vaccine by 2 years of age has increased since the COVID-19 pandemic. Children who did not receive their 2- and 4-month vaccines on time were significantly more likely to not receive any MMR vaccine by 2 years, highlighting opportunities for intervention.

Corresponding Author: To contact the corresponding author, Nina B. Masters, PhD, MPH, email ninam@truveta.com.

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(doi:10.1001/jamanetworkopen.2025.51814)

Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.

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Journal

JAMA Network Open