Dr. Marion Gruber, the director of the F.D.A.’s vaccines office,...

Dr. Marion Gruber, the director of the F.D.A.’s vaccines office, will retire at the end of October, and her deputy, Dr. Philip Krause, will leave in November, according to an email that Dr. Peter Marks, the agency’s top vaccine regulator, sent to staff members on Tuesday morning. One reason is that Dr. Gruber and Dr. Krause were upset about the Biden administration’s recent announcement that adults should get a coronavirus booster vaccination eight months after they received their second shot, according to people familiar with their thinking.Neither believed there was enough data to justify offering booster shots yet, the people said, and both viewed the announcement, amplified by President Biden, as pressure on the F.D.A. to quickly authorize them.
https://www.nytimes.com/2021/08/31/us/politics/fda-vaccine-regulators-booster-shots.html
he's a nice bloke