Dr. Sharfstein on doses schedule: 'We should stick to the regimen that is proven to be 95% effective'

Dr. Josh Sharfstein joins Andrea Mitchell to discuss the vaccine rollout and the FDA coming out against changes to the recommended doses schedule. Dr. Sharfstein says, "We should stick to the regimen that is proven to be 95% effective. But even with that regimen, we should be trying to get as many people vaccinated as we can, particularly in the high risk groups."