Ex-CDC director says U.S. plan to share Pfizer doses flawed

The Biden administration announced Wednesday that the U.S. was purchasing an additional 500 million Pfizer COVID vaccines to donate to other nations. The move is what critics and organizations like the WHO have been calling for — a much more robust effort on behalf of rich countries. Yet some are saying this still isn’t enough. William Brangham discusses with Tom Frieden, former head of the CDC.