The US just marked 25 million Covid-19 cases. Now it's a race between vaccines and variants

It took just over a year for the US to go from one to 25 million coronavirus infections.

That's an average of about 67,934 new infections every day, or an average of one new infection every 1.2 seconds since January 21, 2020.
As infections kept soaring this weekend, so did the death toll. As of Sunday, more than 417,000 people have died from Covid-19 in the United States, according to Johns Hopkins University.
The US death toll could reach 569,000 by May 1, according to the University of...