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.

Despite rising COVID-19 infections in Japan, International Olympic Committee president Thomas Bach said Thursday that there is "no reason whatsoever" to believe the Olympic Games in Tokyo will not open on July 23 as planned.

"This is why there is no plan B and this is why we are fully committed to make these games safe and successful," Back told Japanese news agency Kyodo in an interview Thursday.

However, Bach admitted he could not guarantee that the stands would be full or rule out the possibility that the Games would be held without spectators, according to Kyodo.

The 2020 Summer Olympics were supposed to kick off in Tokyo last year on July 24. But in late March, amid mounting calls to delay or cancel the upcoming Games, the International Olympic Committee and Japan's prime minister announced that the event would be held a year later due to the coronavirus pandemic.

Now, Japan is facing a resurgence of COVID-19. The country of 126 million people reported the highest number of new cases in the Western Pacific region last week. The infection rate -- currently at 32.8 cases per 100,000 people -- increased by 4% over the previous week, according to the World Health Organization's latest COVID-19 weekly epidemiological update.

The Japanese Ministry of Health, Labor and Welfare confirmed 5,662 new cases of COVID-19 as well as an additional 87 fatalities from the disease on Thursday, bringing the cumulative totals to 348,646 cases and 4,829 deaths.

Japanase Prime Minister Yoshihide Suga has declared a state of emergency in Tokyo and 10 other prefectures due to climbing case counts and growing death tolls.