The United States reported over one million new cases of COVID-19 on Monday, setting a global record for a single-day total as the ultra-transmissible omicron coronavirus variant continues its savage spread.

The daily high likely includes a backlog of cases from the holiday weekend. But with more people relying on at-home testing for identifying COVID-19 infections, the number is still probably an underrepresentation of recent cases.

Though cases are rising nationwide, the Eastern US is seeing the highest case rates and steepest increases. New York, New Jersey, and Washington, DC, have the top-three highest infection rates in the country. Louisiana, Maryland, and Alabama are reporting the largest increase in cases over the last two weeks.

The nationwide case tally for Monday is nearly double the country's previous record, set just days ago. The US reported over 1,017,000 cases Monday, beating out the daily total on December 30 of just over 585,000, according to data tracking from The New York Times. The current seven-day average of US cases is 486,658, up 239 percent over the past two weeks. The cumulative tally is over 56 million, the highest in the world.