More than 15.7 million doses of COVID-19 vaccines have been administered in the United States to date, according to data published on the Centers for Disease Control and Prevention's website.

Over 13.5 million people have received one or more doses of the vaccine, while more than 2 million have received two doses, according to the CDC data, which was updated Tuesday.

There were 168,058 new cases of COVID-19 confirmed in the United States on Tuesday, according to a real-time count kept by Johns Hopkins University.

The latest daily case count is far less than the country's all-time high of 298,031 newly confirmed infections on Jan. 2, Johns Hopkins data shows.

An additional 2,550 fatalities from COVID-19 were registered nationwide on Tuesday, down from a peak of 4,462 new deaths on Jan. 12, according to Johns Hopkins data.

COVID-19 data may be skewed due to possible lags in reporting over the holiday weekend and earlier holidays.

A total of 24,253,368 people in the U.S. have been diagnosed with COVID-19 since the pandemic began, and at least 401,730 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, then reaching 200,000 on Nov. 27 before nearing 300,000 on Jan. 2.

In a continued encouraging sign, the number of people currently hospitalized with COVID-19 in the United States decreased on 13 days in January, according to The COVID Tracking Project, a volunteer-run effort to track the U.S. outbreak.

That metric, which is "more resilient" than others to holiday reporting disruptions, increased six times this month, most recently on Jan. 12, The COVID Tracking Project said.

There are 123,820 people currently hospitalized with COVID-19 nationwide.

The U.S. also recorded 144,047 new cases of COVID-19 and 2,141 additional deaths from the disease on Tuesday, though national data was incomplete due to the holiday weekend, according to The COVID Tracking Project.

U.S. President-elect Joe Biden and Vice President-elect Kamala Harris honored the 400,000 Americans who have died from COVID-19 with a tribute in front of the Lincoln Memorial Reflecting Pool in Washington, D.C. on Tuesday evening.

The 400 lights along the pool were lit to symbolize the lives lost to the virus.

At the ceremony, part of the incoming administration's inaugural festivities, Harris called on Americans to "grieve and begin healing together."

"Though we may be physically separated, we, the American people, are united in spirit," she said.

Twenty-three reports of suspected deaths associated with COVID-19 vaccines have been submitted to Norway's national health registry as of Jan. 14, according to an updated statement from the country's drug regulator on Monday.

The Norwegian Medicines Agency said it "cannot rule out that adverse reactions to the vaccine occurring within the first days following vaccination (such as fever and nausea) may contribute to more serious course and fatal outcome in patients with severe underlying disease."

Thirteen of those reports have been assessed by the drug regulator, as well as the Norwegian Institute of Public Health.

"The reports suggest that common adverse reactions to mRNA vaccines, such as fever and nausea, may have contributed to a fatal outcome in some frail patients," Sigurd Hortemo, chief physician at the Norwegian Medicines Agency, said in the statement.

Steinar Madsen, medical director of the Norwegian Medicines Agency, told the state-run broadcaster NRK: "We are not alarmed by this."

"It is quite clear that these vaccines have very little risk, with a small exception for the frailest patients," Madsen said. "Doctors must now carefully consider who should be vaccinated. Those who are very frail and at the very end of life can be vaccinated after an individual assessment."

Norway is currently administering COVID-19 vaccines to the elderly and people in nursing homes with serious underlying diseases -- at first with just the Pfizer/BioNTech vaccine up until Jan. 15, and then also with the Moderna vaccine. Official figures show that more than 30,000 people have received the first shot of the Pfizer or Moderna vaccines in Norway since the end of December.

According to the Norwegian Medicines Agency, an average of 400 people die each week in nursing homes and long-term care facilities nationwide.

The Scandinavian country of 5.3 million people has confirmed more than 58,000 cases of COVID-19 since the start of the pandemic, including at least 521 deaths, according to the latest data from the Norwegian Institute of Public Health.