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Story summary
- U.S. President Donald Trump signed an executive order to split the combined MMR vaccine into separate shots.
- The order reduces the federal childhood immunization schedule from 17 recommended shots to 11.
- It directs the Justice Department to challenge state school-entry vaccination mandates.
- Public-health experts warn separate doses could increase hesitancy, missed appointments, lower herd immunity as measles cases hit a 35-year high.
