COVID-19 updates: Elizabeth Warren tests positive

The senator says she's experiencing "mild symptoms."

ByMorgan Winsor, Emily Shapiro, Ivan Pereira, and Meredith Deliso
Last Updated: December 20, 2021, 12:51 AM EST

As the COVID-19 pandemic has swept the globe, more than 5.3 million people have died from the disease worldwide, including over 806,000 Americans, according to real-time data compiled by Johns Hopkins University's Center for Systems Science and Engineering.

About 61.4% of the population in the United States is fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.

Latest headlines:

Here's how the news is developing. All times Eastern.
Dec 14, 2021, 5:57 AM EST

France mulls tightening entries from UK due to omicron

France is considering tightening restrictions for travelers arriving from the United Kingdom, where the omicron variant appears to be spreading swiftly.

"Regarding Britain, the current rule is to show a negative test less than 48 hours old in order to enter France," French government spokesman Gabriel Attal told France Info radio on Tuesday. "But we are always looking at means to tighten the framework, we are currently working on that and we should, I think, come to a conclusion in the coming days."

People wearing face masks to protect against COVID-19 walk around Tuileries Garden, with a view of the Eiffel Tower in the background, in Paris, France, on Dec. 9, 2021.
Michel Euler/AP Photo, File

Dec 14, 2021, 5:44 AM EST

Mainland China confirms 1st case of omicron variant

China has confirmed its first case of the omicron variant on the mainland, state-run media reported Monday.

The variant was detected in a traveler from overseas who arrived in the northern Chinese port city of Tianjin on Dec. 9. The individual tested positive for COVID-19 last week and subsequent genome sequencing confirmed it was the omicron variant.

The patient, who showed no symptoms, is being treated in isolation at a hospital, according to state-run media.

PHOTO: A woman wearing a face mask walks near shadows cast by other visitors to a shopping mall in Beijing, China, on Dec. 14, 2021.
A woman wearing a face mask walks near shadows cast by other visitors to a shopping mall in Beijing, China, on Dec. 14, 2021. Chinese state media reported on Dec. 13, 2021, that the first case of the omicron variant of the novel coronavirus has been detected in the country's mainland in Tianjin, just east of Beijing.
Ng Han Guan/AP

Dec 14, 2021, 5:31 AM EST

UK reports 1st death from omicron variant

At least one person has died in the United Kingdom after being infected with the omicron variant, British Prime Minister Boris Johnson said Monday.

It's the first publicly confirmed death globally from the new variant of the novel coronavirus, which was initially identified in southern Africa last month and has since spread rapidly around the world. Deaths from omicron may have already occurred in other countries but no others have been publicly confirmed yet.

British Prime Minister Boris Johnson visits the Stow Health vaccination center in Westminster, London, on Dec. 13, 2021.
Jeremy Selwyn/Pool via Reuters

Speaking to reporters during a visit to a vaccination clinic in London, Johnson said the death was a patient who had been diagnosed at a hospital but gave no further details.

"Sadly, at least one patient has now been confirmed to have died with omicron," the prime minister said. "So I think the idea that this is somehow a milder version of the virus, I think that's something we need to set on one side and just recognize the sheer pace at which it accelerates through the population. So the best thing we can do is all get our boosters."

Dec 13, 2021, 9:59 PM EST

NFL to require vaccinated Tier 1 and 2 employees receive boosters by Dec. 27

The National Football League will require that all its vaccinated Tier 1 and 2 employees receive COVID-19 booster shots by Dec. 27, according to a memo sent to all 32 teams within the professional American football league on Monday.

This group of employees includes coaches and other employees who work closely with NFL players and help in essential league operations.

"On November 29, the CDC issued a study showing that the effectiveness of the approved COVID-19 vaccines may decrease over time and has recommended that all eligible vaccinated individuals over the age of 18 should receive a booster shot," the memo states. "Given the increased prevalence of the virus in our communities, our experts have recommended that we implement the CDC’s recommendation."

The memo came as 36 players were added to the NFLS's COVID-19 reserve list. Players are currently not required to receive boosters; but in Monday’s memo, the NFL said teams should consider making boosters available for players and their families.

"Any individual who is not currently subject to the requirement for boosters will be required to obtain the booster within 14 days of becoming eligible," the memo states.

-ABC News’ Katie Conway