Vinay Prasad is returning to his role overseeing vaccine, gene therapy and blood product regulation at the U.S. Food and Drug Administration a little more than a week after he left the agency.

Vinay Prasad, who was ousted as the top vaccine and gene therapy regulator at the US Food and Drug Administration, is returning to his role, the Department of Health and Human Services said Sunday.

Less than weeks after stepping down, Prasad will return to lead CBER “at the FDA’s request,” according to an HHS spokesperson, marking the latest twist in an unusual run leading the FDA office overseeing vaccines and gene therapy.