New cases of Covid-19 are dropping sharply across the U.S. as millions of people get vaccinated daily, fueling optimism that the nation may have averted the surge of infections gripping other parts of the world and is finally turning the corner on what was one of the worse outbreaks globally.As of Saturday, the 7-day average of daily new cases fell to under 50,000 for the first time since October and is down 17% from a week prior, according to a CNBC analysis of data from Johns Hopkins University. Hospitalizations and deaths from the disease are also falling.Cases are falling …
