People over 75, front-line essential workers should get vaccine next, CDC panel says

There were 137,897 people who were vaccinated against COVID-19 across the United Kingdom in the first seven days of the country's mass immunization program, according to Nadhim Zahawi, the U.K. minister in charge of the vaccine rollout.

Zahawi said 108,000 people were administered the vaccine in England, 7,897 in Wales, 4,000 in Northern Ireland and 18,000 in Scotland.

"A really good start to the vaccination program," Zahawi wrote on his official Twitter account Tuesday morning. "That number will increase as we have operationalised hundreds of PCN (primary care networks)."

On Dec. 2, the United Kingdom became the first Western country to approve a COVID-19 vaccine, granting emergency-use authorization to one developed by U.S. pharmaceutical giant Pfizer and its German partner BioNTech. The U.K. government launched a mass immunization program just six days later, administering the shot to people over the age of 80 and front-line health workers.

There were 198,357 new cases of COVID-19 confirmed in the United States on Tuesday, according to a real-time count kept by Johns Hopkins University.

It's the 43rd straight day that the U.S. has reported over 100,000 newly diagnosed infections. Tuesday's tally is down from the country's all-time high of 231,775 new cases confirmed on Dec. 11, according to Johns Hopkins data.

An additional 3,019 deaths from the disease were also registered nationwide on Tuesday, just under a peak of 3,300 fatalities on Dec. 11, according to Johns Hopkins data. It's only the third time since the pandemic began that the country has reported more than 3,000 COVID-19 deaths in a single day.

A total of 16,724,772 people in the U.S. have been diagnosed with COVID-19 since the pandemic began, and at least 303,849 of them have died, according to Johns Hopkins data. The cases include people from all 50 U.S. states, Washington, D.C., and other U.S. territories as well as repatriated citizens.

Much of the country was under lockdown by the end of March as the first wave of pandemic hit. By May 20, all U.S. states had begun lifting stay-at-home orders and other restrictions put in place to curb the spread of the novel coronavirus. The day-to-day increase in the country's cases then hovered around 20,000 for a couple of weeks before shooting back up over the summer.

The numbers lingered around 40,000 to 50,000 from mid-August through early October before surging again to record levels, crossing 100,000 for the first time on Nov. 4 and reaching 200,000 for the first time on Nov. 27.

While the United States continues to see rising numbers of people being hospitalized for COVID-19 or dying from the disease, one part of the country appears to be showing some progress, according to data collected and published by The COVID Tracking Project, a volunteer-run effort to track the U.S. outbreak.

Daily COVID-19 hospitalizations reached an all-time high of 112,816 on Tuesday, while 189,783 new cases of COVID-19 and 2,918 deaths from the disease were reported nationwide. The country's seven-day averages for COVID-19 hospitalizations -- 109,031 -- and deaths -- 2,472 -- were also record highs, according to The COVID Tracking Project.

However, the data showed progress in the Midwest, with states like Illinois, Michigan and Wisconsin seeing a decline in reported cases over the past month, according to The COVID Tracking Project.

"In the Midwest, current hospitalizations have continued to fall. As the other regions keep rising, the Northeast or West could soon have the most hospitalizations per capita," the group wrote on Twitter Tuesday.

The number of coronavirus-related deaths saw a major increase over the last week, according to an internal memo from the U.S. Department of Health and Human Services that was obtained by ABC News.

Between Dec. 9 and Dec. 15 there were 17,247 new fatalities reported, which marked an 11.4% increase from the previous week, according to the memo.

During that same seven-day period, the country recorded 1,494,763 new cases, which marked an 8.7% jump from the previous week, HHS said.

Roughly 23% of all hospital inpatients have COVID-19, the memo said. The all-time peak was 24%, according to HHS.

About 30% of hospitals across the country have more than 80% of their ICU beds filled, according to the memo.

-ABC News' Josh Margolin