Study shows how toxic RFK Jr.’s change to measles vaccine is for US toddlers

Key Points:

• In September, a panel of advisors handpicked by Health Secretary Robert F. Kennedy Jr. voted to remove federal recommendations for the combined MMRV vaccine (measles, mumps, rubella, and varicella) without new data or a thorough evaluation, impacting vaccine coverage for vulnerable US toddlers.
• The decision means private insurers no longer must cover MMRV, and the vaccine is no longer available through federal programs serving about half of American children, primarily from low-income families.
• An independent study analyzing King County, Washington data from 2015-2025 found 15% of toddlers received MMRV, mostly children from minority groups and low-income families, who are now at risk of reduced vaccine access due to the policy change.
• MMRV was previously preferred less than MMR+V because of a slight increase in febrile seizures after the first dose, but experts have maintained it is safe and effective; no new evidence has emerged to justify the recent policy reversal.
• Health policy experts criticized the ACIP’s decision for lacking standard evaluation and ignoring equity implications, highlighting that combination vaccines reduce barriers for low-resource families, and noted the absence of safeguards that usually ensure ACIP’s independence.