By David Lim, Adam Cancryn and Sarah Owermohle

If nominated and confirmed, Califf would take over an agency poised to make key decisions on coronavirus vaccines and treatments.

If nominated and confirmed, Califf would take over an agency poised to make key decisions on coronavirus vaccines and treatments.

If nominated and confirmed, Califf would take over an agency poised to make key decisions on coronavirus vaccines and treatments.

If nominated and confirmed, Califf would take over an agency poised to make key decisions on coronavirus vaccines and treatments.