New York City Mayor Bill de Blasio unveiled his 2021 student achievement plan, which will focus on getting students caught up after, for some, 18 months of remote learning.

“Clearly there will be a COVID achievement gap and we have to close that COVID achievement gap,” the mayor said.

Schools Chancellor Richard Carranza said the plan is to: get a baseline of what ground was lost; increase the high-quality digital curriculum available for every single school; launch a one-stop digital learning hub; deepen professional development; expand Parent University (the "online learning and empowerment platform" for families); and confront the trauma and mental health crisis within schools.

ABC News' Aaron Katersky contributed to this report.

In South Korea, more than 3,000 COVID-19 patients were identified in the last week, and in the Seoul area, as of Wednesday 506 were unable to be taken to hospitals this week due to bed shortages, Yonhap reported. 

South Korea reported 682 new cases and eight more deaths on Thursday, the Korea Disease Control and Prevention Agency reported.

The nation now has over 40,000 confirmed cases.

The Vaccines and Related Biological Products Advisory Committee, an independent panel of infectious disease experts, doctors and scientists, is meeting Thursday to recommend if the Pfizer vaccine should be considered safe and effective in the U.S.

Food and Drug Administration Commissioner Stephen Hahn told “Good Morning America” Thursday that he wouldn’t “prejudge” what the advisory committee would vote, but said the FDA will act “quickly” afterward.

“FDA's reviewers are mothers, fathers, brothers, sisters. We totally understand the urgency of this situation, and we are working around the clock on behalf of America,” Hahn said. “FDA scientists are known around the world for their expertise. We are a regulatory gold standard for the authorization or approval of medical products, including vaccines. We intend to do and we have done a very thorough review to get this right, to get all the answers we possibly can from the data.”

Hahn also said the FDA was “working very closely with our U.K. partners” after two people who received the vaccine in the U.K. had severe allergic reactions.

Hahn told NBC that it was “possible” that the FDA could advise people with significant allergies to not get the vaccine.

Hahn said the allergy issue would be discussed at Thursday’s meeting but added that the FDA stands by “our initial assessment” that Pfizer’s vaccine “does meet our criteria.”

ABC News' Ben Gittleson contributed to this report.

Just as the U.S. surpassed 280,000 deaths from coronavirus on Saturday, Dec. 5, the country is likely to pass 290,000 deaths later today.

The current death toll stands at 289,373, according to the latest data compiled by Johns Hopkins University.

This comes on the heels of new records reported yesterday in highest single-day total and seven-day average of new daily deaths -- 3,054 and 2,276 respectively -- according to The COVID Tracking Project.

ABC News' Ahmad Hemingway contributed to this report.

There were 192,299 new cases of COVID-19 confirmed in the United States on Monday, according to a real-time count kept by Johns Hopkins University.

It's the 35th straight day that the U.S. has reported over 100,000 newly diagnosed infections. Monday's tally is less than the country's all-time high of 227,885 new cases confirmed on Dec. 4, according to Johns Hopkins data.

An additional 1,404 deaths from the disease were also registered nationwide on Monday, down from a peak of 2,879 fatalities on Dec. 3, according to Johns Hopkins data.

COVID-19 data may be skewed due to possible lags in reporting over Thanksgiving followed by a potentially very large backlog from the holiday.

A total of 14,954,331 people in the U.S. have been diagnosed with COVID-19 since the pandemic began, and at least 283,746 of them have died, according to Johns Hopkins data. The cases include people from all 50 U.S. states, Washington, D.C., and other U.S. territories as well as repatriated citizens.

Much of the country was under lockdown by the end of March as the first wave of pandemic hit. By May 20, all U.S. states had begun lifting stay-at-home orders and other restrictions put in place to curb the spread of the novel coronavirus. The day-to-day increase in the country's cases then hovered around 20,000 for a couple of weeks before shooting back up over the summer.

The numbers lingered around 40,000 to 50,000 from mid-August through early October before surging again to record levels, crossing 100,000 for the first time on Nov. 4 and reaching 200,000 for the first time on Nov. 27.