Covid-19 is now hitting one group of Americans harder

America’s daily Covid-19 cases and deaths are now about one-fifth of what they were during their winter peaks — and one expert says the country’s improved numbers have a lot to do with the climbing vaccinations.America’s daily Covid-19 cases and deaths are now about one-fifth of what they were during their winter peaks — and one expert says the country’s improved numbers have a lot to do with the climbing vaccinations.