As the U.S. marks one million people dead from COVID-19, scientists suggest that nearly one third of those deaths could have been prevented if more people had chosen to be vaccinated. NPR's Selena Simmons-Duffin reports.

And even though the unvaccinated continue to make up a majority of COVID-19 cases and related hospitalizations, the number of Americans who say they won't get a COVID shot hasn't budged in a year. NPR's John Burnett spoke to a few of them.

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