特朗普签署行政令，要求美国卫生与公众服务部开发将麻疹、腮腺炎和风疹（MMR）疫苗分为三种单病疫苗的选项[1]。这一举措迎合了支持"让美国再次健康"（MAHA）运动的选民，但同时也为民主党提供了政治攻击的机会[1]。
特朗普长期以来（至少自2014年）倡导将疫苗分散到多次就诊中接种[1]。他曾在社交媒体上声称组合疫苗会导致自闭症，这一说法已被证伪[1]。卫生部长罗伯特·肯尼迪（Robert F. Kennedy Jr.）是一名长期的反疫苗活动人士[1]。
然而，民调数据显示支持程度有限。即使在MAHA支持者中，仅有10%将重新评估疫苗安全列为联邦政府的首要优先事项；42%优先关注降低卫生成本，21%优先关注限制食品中的化学添加剂[1]。民主党医学候选人（包括314 Action组织相关人士）正利用此举发动攻击[1]。
President Trump has signed an executive order directing the Department of Health and Human Services to develop options for separating the measles, mumps, and rubella (MMR) vaccine into three individual disease vaccines [1]. The move fulfills a long-standing position Trump has advocated since at least 2014 to space out vaccine administration across multiple clinic visits [1].
The decision appeals to supporters of the Make America Healthy Again (MAHA) movement, many of whom have questioned current vaccination practices [1]. However, it simultaneously provides Democrats with a political opening, as medical candidates aligned with organizations like 314 Action have begun using the order to criticize the administration [1]. Meanwhile, polls reveal limited public appetite for the shift: only 10 percent of MAHA supporters identify reassessing vaccine safety as a top federal priority, compared to 42 percent who prioritize reducing healthcare costs and 21 percent focused on limiting chemical additives in food [1].
Trump has previously claimed on social media that combination vaccines cause autism—a claim that has been debunked [1]. Robert F. Kennedy Jr., who heads the Health and Human Services Department, has a long history as a vaccine skeptic [1].