Health agency opens comment period on vaccine classifications, raising concerns over routine immunization

The Department of Health and Human Services has posted a request for public input on how vaccines are categorized, potentially altering the recommended schedule. This follows an executive order aimed at limiting childhood vaccinations and breaking up the combined measles, mumps, and rubella vaccine. Experts warn that such changes could reduce vaccination rates and undermine public health protections.

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The current CDC framework places vaccines into three tiers: universal recommendation, at-risk designation, and shared clinical decision-making. The proposed new categories, such as "recommended, but not during infancy," would represent a structural shift in how immunization guidance is communicated to providers and families. HHS's notice cites "strength of evidence" and "individual circumstances and values" as potential criteria for reclassification.

Vaccines on the routine schedule undergo clinical trials against placebos or comparison groups before approval, followed by post-market surveillance for rare side effects