BREAKING: In a major blow to vaccine efforts, senior FDA leaders stepping down Two of the FDA’s most senior vaccine leaders are exiting from their positions, raising fresh questions about the Biden administration and the way that it’s sidelined the FDA. Marion Gruber, director of the FDA’s Office of Vaccines Research & Review and 32-year veteran of the agency, will leave at the end of October, and OVRR deputy director Phil Krause, who’s been at FDA for more than a decade, will leave in November. The news, first reported by BioCentury, is a massive blow to confidence in the agency’s...