Another grim milestone is expected in the battle against COVID-19.

The Centers for Disease Control and Prevention predicted in a recent study that the COVID-19 United States death toll could surpass 400,000 before President-Elect Joe Biden is sworn-in next Wednesday.

On Thursday alone, Johns Hopkins University reported more than 229,000 new cases and thousands of deaths.

"Even as we roll out safe and effective vaccines through Operation Warp Speed, continued growth of testing options and testing capacity will be essential," says Health and Human Services Secretary Alex Azar.

Meanwhile, several states are expanding vaccine eligibility to people who are over 65 years old while also struggling to distribute those vaccines.

Over 30 million doses of the vaccine have been distributed, but only about 11 million have been administered.

In California, Dodger Stadium is now serving as a mass vaccination site. Gillette Stadium, in Massachusetts, is doing the same.

As states scramble to put vaccines in arms, President-elect Biden released his vaccine distribution plan. He has called for 100 million shots in his first 100 days in office.

Health experts believe it's a possible goal.

"I think if we put our energy and resources into it, we absolutely can hit that," says Dr. Ashish Jha, the dean of Brown University School of Public Health. "And to be perfectly honest, I want them to beat that because we need to get as many people vaccinated as quickly as possible."