Updated at 9:52 a.m. ET Wednesday
President-elect Joe Biden warned Tuesday that the coronavirus pandemic will get worse before it gets better.
"Our darkest days in the battle against COVID are ahead of us, not behind us," Biden told reporters during a year-end news conference in Wilmington, Del.
He said that Americans, when united, could overcome the crisis, and he called the first vaccines being administered a good thing. But he noted that distribution of the vaccines is one of the biggest operational challenges the country has ever faced.