Trump administration's embattled FDA vaccine chief is leaving for the second time

The Food and Drug Administration’s controversial vaccine chief, Dr. Vinay Prasad, is once again leaving the agency. FDA Commissioner Marty Makary announced the departure to staff in an email late Friday. It's the second time he has abruptly departed the agency following controversial decisions involving the review of vaccinations and specialty drugs for rare diseases. Makary said Prasad would return to his academic job at the University of California, San Francisco. Prasad's time on the job has been marked by a string of reversals in the FDA's review of vaccines and specialty drugs.