U.S. sets grim new record for daily COVID-19 cases amid Omicron surge

People wait in line for COVID-19 tests at a mobile testing site on Times Square in New York, the United States, Dec. 20, 2021. (Xinhua/Wang Ying)

WASHINGTON, Dec. 28: The lightning spread of the new Omicron variant in the United States has driven daily COVID-19 new cases to a record high of over 510,000 on Monday.