The CDC and the Trump administration are considering separating the combined MMR vaccine into individual shots amid a measles outbreak, but experts warn this would be costly, complicated, and potentially reduce vaccination rates, with no scientific evidence supporting the need for such a change.
Acting CDC Director Jim O’Neill called for the development of separate vaccines for measles, mumps, and rubella, citing a suggestion from President Trump, though current scientific evidence supports the combined MMR vaccine for safety and efficacy. The move would increase the number of injections children receive and is not currently supported by U.S. health authorities, amid rising measles cases and ongoing debates about vaccine safety and administration.
The acting CDC director, Jim O'Neill, urged vaccine manufacturers to develop separate monovalent vaccines for measles, mumps, and rubella, following a recommendation to avoid the combined MMR vaccine for children under 4, and noting that currently, no monovalent vaccines are licensed in the U.S.