COVID-19 live updates: 'Extremely unlikely' virus came from Chinese lab, WHO says

Ten percent of Americans, or 31.6 million people, have received one or more doses of the COVID-19 vaccine, according to a U.S. Department of Health and Human Services planning document obtained by ABC News.

Three percent of the population, or 9.1 million people, have gotten both shots of the two-dose vaccine, according to the document.

U.S. President Joe Biden has pledged to get 100 million shots into Americans' arms during the first 100 days of his presidency. Since his Jan. 20 inauguration, 24.6 million doses have been administered.

ABC News' Josh Margolin and Brian Hartman contributed to this report.

U.S. Rep. Ron Wright, R-Texas, died Sunday after contracting COVID-19 last month, his office confirmed in a statement Monday.

Wright, who had lung cancer, was diagnosed with the disease on Jan. 21 and admitted to Baylor Hospital in Dallas. He was 67.

"Over the past few years, Congressman Wright had kept a rigorous work schedule on the floor of the U.S. House of Representatives and at home in Texas’ Congressional District 6 while being treated for cancer," his office said.

Wright is the second American lawmaker to die after testing positive for COVID-19. Luke Letlow, Louisiana's incoming Republican congressman, died at age 41 in late December, just days before he was due to be sworn in.

ABC News' Mariam Khan contributed to this report.

Delta Air Lines announced Monday that it will continue blocking out middle seats and limiting capacity on flights because of the coronavirus pandemic.

The extra space will last through April 30, 2021.

"We'll continue to reassess seat blocking in relation to case transmission and vaccination rates," Bill Lentsch, chief customer experience officer of Delta Air Lines, said in a statement.

Delta, which has blocked out seats and limited capacity on flights since last April, is currently the only U.S. airline still blocking out middle seats because of the virus.

ABC News' Gio Benitez contributed to this report.

Some classes at the University of North Carolina have the option to go virtual for nearly two weeks after school officials received hundreds of complaints following Saturday night's crowd that rushed Franklin Street.

"As you are no doubt aware, last night hundreds of Carolina fans -- many, presumably students -- flooded Franklin Street to celebrate our men’s basketball victory over Duke," UNC-Chapel Hill officials said in a statement Sunday.

UNC-Chapel Hill students have agreed to adhere to COVID-19 rules like state gathering restrictions, mask-wearing and physical distancing, according to university officials.

"Those standards do not include exceptions for winning basketball games," the officials said.

The timing of the crowd fell the weekend before students returned for in-person learning for spring semester. While in-person instruction will continue Monday, faculty are allowed to teach virtually and return to in-person learning on Feb. 17, according to the university. Students who attend in-person classes are required to be tested twice a week.

ABC News' Will Gretzky contributed to this report.