The measles, mumps and rubella (MMR) vaccine is undergoing more scrutiny by the Trump administration in their ongoing reassessment of vaccines despite the worst measles outbreak in decades. Jim O’Neill, the deputy secretary of the US Department of Health and Human Services (HHS) and the acting director of the US Centers for Disease Control and Prevention (CDC), called on Monday for new vaccines to replace the current MMR shots. “I call on vaccine manufacturers to develop safe monovalent...