The U.S. passed the milestone of administering more than 300 million Covid-19 vaccine doses. New cases and deaths continue to plunge and are back to the levels just after U.S. states began imposing restrictions in March 2020.
The U.S. passed the milestone of administering more than 300 million Covid-19 vaccine doses. New cases and deaths continue to plunge and are back to the levels just after U.S. states began imposing restrictions in March 2020.