Coronavirus updates: US reports nearly 300,000 new cases in all-time high

A preliminary analysis from Public Health England found that the new COVID-19 variant detected in the United Kingdom isn’t more deadly than the prior dominant variant. 

It’s still likely that the new variant is more easily transmissible, because of the speed at which it has outpaced the prior variant. 

This new variant now accounts for over half of the new positive cases in the U.K., the study said. 

The variants are all the same virus, no matter their small genetic differences. SARS-COV-2 is a respiratory virus, meaning it is transmitted through droplets, so masks and social distancing still work to slow transmission, no matter the variant.

In addition to several European nations, the variant has also been reported in North America and Asia.

ABC News’ Ian Pannell, Sony Salzman and Christine Theodorou contributed to this report.

Russian Deputy Prime Minister Tatiana Golikova told reporters Monday that Russia’s total number of deaths from all causes during the pandemic has risen by 13.8% between January and November compared to the same period last year.

Of those excess deaths, Golikova said 81% of them were caused by COVID-19.

Data released by Russia’s state statistics agency shows that Russia has recorded 230,000 more deaths this year compared to 2019. If 81% of those are COVID-19 related, then the country’s total COVID-19 death toll is 186,000.

That is three times more than the official death toll published by the country’s health authorities (54,000).

A total of 186,000 fatalities would bring Russia’s death toll to the third worst in the world behind the U.S. and Brazil.

ABC News’ Patrick Reevell contributed to this report.

December has been the worst month on record for cases, hospitalizations, and deaths. Even with delays in reporting because of the holidays, hundreds of thousands of Americans are still testing positive for the virus every day.

The U.S. has logged more than 5.6 million cases in the first 28 days of December -- more than any month on record, according to ABC News’ analysis of data compiled by the COVID Tracking Project.

According to the CDC, California currently has the highest average of daily cases per 100,000 people in the last seven days, followed by Tennessee, Oklahoma and Arizona.

Across the U.S., 121,235 people are currently hospitalized with COVID-19 -- setting a new record high since the pandemic began. That total is double the previous hospitalization peaks from April and July.

ABC News’ Arielle Mitropoulos contributed to this report.

Vice President-elect Kamala Harris received her first dose of the Moderna vaccine on Tuesday morning at United Medical Center in Washington, D.C.

"That was easy!" she said after. "I barely felt it."

"I want to encourage everyone to get the vaccine," Harris said. "It is literally about saving lives. I trust the scientists, and it is the scientists who created and approved this vaccine."

"Right in your community is where you can take the vaccine," Harris said. "Where you will receive the vaccine by folks you may know, folks who otherwise are working in the same hospital where your children were born, folks who are working in the same hospital where an elderly relative received the kind of care that they needed. So I want to remind people that they have trusted sources of health, and that's where they will be able to go to get the vaccine, so I encourage them to do that."

Harris’ husband, Doug Emhoff, also received the vaccine.