According to AFP, the order comes amid growing debate over childhood vaccination policy in the United…... US President Donald Trump has signed an executive order directing a review of school vaccination requirements while renewing his call for the measles, mumps and rubella vaccine to be administered as three separate shots. According to AFP, the order comes amid growing debate over childhood vaccination policy in the United States, where measles cases have surged to their highest level in 35 years. Kennedy has initiated a broad review of vaccines, including long-established childhood vaccines, while also making significant changes to the childhood immunisation schedule and reducing funding for the development of new vaccines. US courts earlier this year suspended a shake-up of vaccination policy initiated by Kennedy.