Vinay Prasad to leave in April after decisions involving vaccine reviews and specialty drugs for rare diseasesThe Food and Drug Administration’s embattled vaccine chief, Dr Vinay Prasad, is once again leaving the agency – the second time in less than a year that he’s departed after decisions involving the review of vaccinations and specialty drugs for rare diseases.FDA commissioner Marty Makary announced the news to FDA staff in an email late Friday, saying Prasad would depart at the end of Apri...