David Kessler, the Biden administration’s chief science officer for Covid-19, will step down this week amid question marks about what the next iteration of the Covid vaccine (from booster to price) will look like moving forward, and shortly after the admin’s other long -time chief medical advisor, Tony Fauci, stepped down. Buttressed by his FDA commissioner experience from 1990-1997, Kessler stood atop the reincarnated version of Operation Warp Speed, helping to bring the bivalent booster to millions, as well as millions of new doses of oral antivirals. Keep reading Endpoints with a free subscription Unlock this story instantly and join 156,100+ biopharma pros reading Endpoints daily — and it’s free. SIGN UP LOG IN