Three-quarters of all Americans -- nearly 250 million people -- have now received at least one COVID-19 vaccine dose, according to updated data from the Centers for Disease Control and Prevention.

On average, around 296,000 Americans daily are receiving their first shot, down by about 35% since mid-December, federal data shows.

Some 62.7 million eligible Americans -- those ages 5 and up -- are unvaccinated.

-ABC News' Arielle Mitropoulos

Around 981,000 children in the United States tested positive for COVID-19 last week, according to a new report from the American Academy of Pediatrics and the Children's Hospital Association.

This "dramatic" uptick is a nearly 70% increase over the 580,000 added cases reported the week ending Jan. 6, and a tripling of case counts from the two weeks prior, the organizations said.

With nearly 9.5 million children having tested positive for the virus since the onset of the pandemic, that means 10% of those cases were in the past week alone.

In recent weeks, there has been a significant increase in demand for coronavirus tests as more Americans are exposed to the virus. Many students have also been tested as they return to school, which can lead to an increase in these numbers.

The organizations said there is an "urgent" need to collect more age-specific data to assess the severity of illness related to new variants as well as potential longer-term effects, and noted in their report that a small proportion of cases have resulted in hospitalization and death.

The rising number of pediatric cases has renewed the push for vaccination. Nearly 19% of children ages 5 to 11 and about 55% of those ages 12 to 17 are fully vaccinated, according to federal data.

-ABC News' Arielle Mitropoulos

All intensive care units are full in Oklahoma City, where 117 patients are in emergency rooms waiting for an open bed, Dr. Julie Watson, chief medical Officer of INTEGRIS Health, said Tuesday.

Some patients have been waiting more than 24 hours for an available ICU bed, Watson said.

"Our emergency departments are overflowing. Our health care professionals are exhausted. We've been working nearly nonstop for over two years now," Watson said at a news conference. "Omicron cases are rising faster than previous variants and we are struggling to keep up."

"We aren't able to care for patients the way we normally do," she continued. "It feels, and sometimes even looks, like a war zone. … We have to care for patients in hallways, sometimes closets."

Oklahoma City hospitals are also experiencing staffing shortages and supply chain shortages.

"Some days we don't have syringes, or saline or chest tube setups," she said.

-ABC News' Katherine Carroll

Kansas will end its contact tracing program at the end January due to an overwhelming number of COVID-19 cases and a "diminished" willingness of people to take part, the state health department announced Tuesday.

"As we enter the third year of this pandemic, public health has to begin to adjust the level of response to help alleviate the strain on the Public Health system," Janet Stanek, acting secretary of the state's Department of Health and Environment, said in a statement. "The pandemic is far from over, but this step is a move toward managing COVID-19 as an endemic disease. The responsibility of protecting yourself and others belongs to all of us."

-ABC News' Will McDuffie

Italian police have arrested a nurse accused of pretending to inject COVID-19 vaccines into the arms of anti-vaxxers so they could benefit from vaccination certificates.

Investigators used a hidden camera to capture the nurse working at a vaccination center in Palmero. A clip from the footage, released Saturday by Italy's State Police, purportedly shows the woman preparing a booster dose of a COVID-19 vaccine and then emptying the syringe into a piece of gauze before pretending to inject it into an individual's arm. She faces charges of forgery and embezzlement, according to police.

Police said the woman also faked her own booster shot so she could continue working at the vaccination center, in coordination with another nurse who was arrested last December on similar charges. The other nurse is accused of faking COVID-19 vaccinations for 11 people, including a well-known leader of an anti-vaccine movement, according to police.

New restrictions came into force in Italy on Jan. 10, barring people who aren't fully vaccinated against COVID-19 from accessing restaurants, gyms, swimming pools, theaters, cinemas, sport events and public transport. Unvaccinated individuals who recently recovered from COVID-19 are exempt from the new rule, which will be in force until March 31. The measures were imposed amid a sharp rise in COVID-19 infections across the European country.