Coronavirus cases surged to a new record on Monday, with the United States now averaging 111,000 cases each day for the past week, a grim milestone amid rising hospitalizations and deaths that cast a shadow on positive news about the effectiveness of a potential vaccine.
As the number of infected Americans passed 10 million and governors struggled to manage the pandemic, President-elect Joseph R. Biden Jr. tried on Monday to use his bully pulpit — the only tool at his disposal until he replaces President Trump in 72 days — to plead for Americans to set aside the bitterness of the 2020 election and wear a mask.
