About 2.4 million people in the United States are now receiving Covid-19 vaccinations daily, but one medical expert thinks the nation may not reach herd immunity this year if more people can’t be persuaded to get a shot.
About 2.4 million people in the United States are now receiving Covid-19 vaccinations daily, but one medical expert thinks the nation may not reach herd immunity this year if more people can’t be persuaded to get a shot.
