The order recommends separating the measles, mumps and rubella (MMR) vaccine into three different shots administered in separate visits, and directs the nation's health department to improve vaccine research.
Trump also said in an event at the Oval Office on Monday afternoon that one-year-olds should have their shots separated out into five separate visits, though it wasn't clear whether he was talking about all the vaccines they receive or specific ones.
States, not the federal government, have the authority to require vaccinations for schoolchildren. The order advises states with school vaccine mandates to consider updating their laws to reflect the administration's recommendations.
