COVID updates: Team USA figure skater Vincent Zhou tests positive at Olympics

In Oklahoma, where just 9% of ICU beds are available statewide, for health care workers "every day is just filled with nonstop suffering," a nurse told ABC News.

"I just pray I don't have to zip up another body bag, I don't have to call someone and let them know that their loved one's not coming home," Kelly Hale, a nurse at Mercy Hospital Oklahoma City, told ABC News. "We're all just one patient away from an emotional breakdown."

"The majority of our patients are unvaccinated which adds just a whole other level of difficulty for us," Hale said.

She continued, "No one really knows how many tears I shed. Not my family, not my friends. I really want them to know."

"Just please be nice if you know someone in the health care field that's going through this," Hale said. "Just reach out see if they're okay."

-ABC News' Arielle Mitropoulos

The daily death average in the U.S. now stands at more than 2,400 -- the highest daily death average in nearly one year and nearly double the average from one month ago.

But cases are continuing to fall with all but three states reporting declining or plateauing case rates. Washington state is seeing an increase in cases while Maine and Montana are reporting cases at a plateau, according to federal data.

Hospitalizations are also dropping nationwide. About 120,000 COVID-19-positive patients are currently in U.S. hospitals. Fifteen days ago, there were 160,000 patients, according to federal data.

However it's still not clear how many of these patients were admitted to the hospital for COVID-19 and how many people coincidentally tested positive for the virus after they were admitted for other reasons.

Nearly 62 million eligible Americans remain completely unvaccinated. 

-ABC News' Arielle Mitropoulos

A new study from the California Department of Public Health found that your odds of testing positive for COVID-19 are 83% lower if wearing an N95 or KN95 mask while indoors compared to no mask. 

The odds of testing positive are 66% lower if wearing a surgical mask compared to no mask, and 56% lower if wearing a cloth mask compared to no mask, the study found. 

This study, however, was conducted prior to the more contagious variants and did not inquire about additional infection control behaviors such as social distancing. 

-ABC News' Sony Salzman, Aiya Aboubakr, Nitya Rajeshuni

The U.S. is now reporting an average of over 2,300 COVID-19-related fatalities each day -- the highest daily death average in nearly one year, according to federal data.

In the last week alone, the nation's daily death average has increased by more than 31%.

Overall, however, the nation's average is still significantly lower than last winter, when the U.S. peaked at about 3,400 deaths per day.

Meanwhile, the U.S. case rate continues to drop rapidly, according to federal data (deaths are a lagging indicator compared to cases). The nation is now reporting an average of 415,000 new cases each day -- nearly half the average from the nation's omicron peak in mid-January. 

But case rates still remain extremely high, with 99% of U.S. counties reporting high transmission.

Alaska currently leads the nation in new cases per capita, followed by Washington and North Dakota.

-ABC News' Arielle Mitropoulos