How effective is the first shot of the Pfizer or Moderna vaccine?
The vaccine rollout is underway, but what happens if there is a supply disruption? Would it be feasible to change strategy and give more people a first dose? An expert analyzes the data.
William Petri, Professor of Medicine, University of Virginia •
conversation
March 19, 2021 • ~4 min
March 19, 2021 • ~4 min