Acting CDC director calls for MMR vaccine to be broken up into three shots There’s no evidence to suggest breaking up the vaccine makes the shot safer or more effective

https://www.statnews.com/2025/10/06/trump-official-jim-oneill-break-up-mmr-vaccine/?utm_campaign=morning_rounds&utm_medium=email&_hsenc=p2ANqtz--GbnZGtyBizz1cmfDyKeN41FSLYEOWis75GFVZ_bIzxQ6iYjpeqmwUtuVIMZf_2GxcmjdSENeRTsWNoaY-D71OEHYpAQ&_hsmi=384024355&utm_content=384024355&utm_source=hs_email O’Neill approves ACIP recs while amplifying Trump on MMR shots CDC Acting Director Jim O’Neill approved recommendations allowing anyone over the age of 6 months to receive an updated Covid-19 shot after discussing the risks and benefits with a provider. He also approved a recommendation that children under the age of 4 receive the measles, mumps, and rubella vaccine and the chickenpox shot separately, as opposed to receiving a combined shot. STAT’s Anil Oza and Chelsea Cirruzzo have the details on what this means for insurance coverage and more. O’Neill signed off on the recommendations more than two weeks ago, according to the announcement yesterday. But even some vaccine program experts were unaware, leaving low-income children at risk of limited access. O’Neill also said yesterday on X that the MMR vaccine should be broken up into three shots. The post did not include a reason, but linked to a previous message from President Trump. Anil has the details on the origin of this repeated call from conservatives and what the evidence says.