The hunt for herd immunity: Suddenly, the U.S. seems in better shape on COVID-19

For the last year, stories about hard-hit American communities clobbered by COVID-19 served as a cautionary tale. But things are improving in many parts of the country, with herd immunity inching closer.

The hunt for herd immunity: Suddenly, the U.S. seems in better shape on COVID-19

For the last year, stories about hard-hit American communities clobbered by COVID-19 served as a cautionary tale. But things are improving in many parts of the country, with herd immunity inching closer.