In the email, CBER Director Dr. Peter Marks said Gruber will retire on October 31, and Krause is leaving in November. Marks thanked Gruber for her leadership throughout efforts to authorize and approve Covid-19 vaccines, and Krause for serving in a "key role in our interactions to address critical vaccine-related issues with our public health counterparts around the world."
https://www.msn.com/en-us/news/us/two-senior-fda-vaccine-leaders-step-down-as-agency-faces-decision-on-boosters/ar-AANXiSk?ocid=msedgdhp&pc=U531