The United Kingdom, France and Italy have all set new record highs for daily COVID-19 cases.

The U.K. recorded a record 129,471 cases in the last 24 hours, according to government data. That brings the total cases in the last week to 802,137-- a 30.3% rise from the previous week.

France recorded a record 179,807 new daily cases, according to the national public health agency Santé Publique France. This could in part be because of a lag in reporting over the Christmas weekend (an unlikely low of 30,383 cases was reported on Monday).

Italy saw a record 78,313 new cases of COVID-19 in the last 24 hours. Italy also saw just 30,810 new cases on Monday following the holiday.

-ABC News' Ibtissem Guenfoud

The U.S. is averaging more than 206,000 new COVID-19 cases each day -- a roughly 147% jump in the last month, according to federal data.

Five states -- Florida, New Jersey, New York, Delaware and Massachusetts -- are reporting more new cases than at any other point in the pandemic, according to federal data.

Florida, Georgia and Washington, D.C., have seen their case averages triple, while Louisiana, Hawaii, Maryland, New Jersey and New York City have seen their case averages double.

-ABC News' Arielle Mitropoulos

The Biden administration has ended its travel ban on eight African countries, citing increased knowledge of omicron and improved testing requirements for international travelers.

The ban was put in place in late November amid concerns about the new variant that was first found in southern Africa.

President Joe Biden said in a proclamation Tuesday, "Scientific experts have determined that people who are vaccinated against COVID-19 are protected against severe disease and hospitalization from the Omicron variant. Moreover, the Omicron variant has now spread to more than 100 countries, and it is prevalent in the United States. At the same time, my Administration has made international travel to the United States from all countries safer."

-ABC News' Allison Pecorin

The Chinese city of Xi'an has 175 of the nation's 209 new COVID-19 cases, health authorities said.

Xi'an is under lockdown, leaving highways and walkways empty.

-ABC News' Christine Theodorou

Last week, the CDC reported that omicron had overtaken delta to become the dominant COVID-19 variant in the U.S. However, on Tuesday, the CDC revised its initial estimates to noticeably lower numbers of omicron cases.

Last Monday, the CDC said omicron was estimated to makeup more than 73.2% of new cases as of Dec. 18. Now, the CDC says just 22.5% of new U.S. cases were estimated to be omicron as of Dec. 18. 

According to new data from this week, the CDC says omicron is now estimated to account for 58.6% of all new cases, officially making it the dominant strain in the U.S. In the New York and New Jersey region as well as the deep South, omicron is estimated to account for more than 85% of new cases. 

A CDC spokeswoman said in a statement, "There was a wide predictive interval posted in last week’s chart, in part because of the speed at which omicron was increasing. We had more data come in from that timeframe and there was a reduced proportion of omicron. It’s important to note that we’re still seeing steady increase in the proportion of omicron."

ABC contributor Dr. John Brownstein, an epidemiologist at Boston Children's Hospital, said, "It may be possible that a large portion of their [the CDC's] sequencing data had come from labs that were specifically looking for s-gene samples, thus falsely elevating the percent omicron in samples."

-ABC News' Arielle Mitropoulos