"Celebrate with people in your household," the agency says in updated guidance.
A pandemic of the novel coronavirus has now killed more than 1.2 million people worldwide.
Over 50.4 million people across the globe have been diagnosed with COVID-19, the disease caused by the new respiratory virus, according to data compiled by the Center for Systems Science and Engineering at Johns Hopkins University. The actual numbers are believed to be much higher due to testing shortages, many unreported cases and suspicions that some national governments are hiding or downplaying the scope of their outbreaks. The criteria for diagnosis -- through clinical means or a lab test -- has also varied from country to country.
Since the first cases were detected in China in December, the virus has rapidly spread to every continent except Antarctica. The United States is the worst-affected nation, with more than 10 million diagnosed cases and at least 237,742 deaths.
Nearly 200 vaccine candidates for COVID-19 are being tracked by the World Health Organization, at least 10 of which are in crucial phase three studies. Of those 10 potential vaccines in late-stage trials, there are currently five that will be available in the United States if approved.
The United States hit another grim milestone Monday afternoon, when it surpassed 10 million COVID-19 infections, according to Johns Hopkins University.
With 10,018,278 COVID-19 cases, the U.S. has reported more infections than any other nation. India, which has the second highest number of infections, reported 8,553,657 COVID-19 cases as of Monday.
So far, 237,742 Americans have died of COVID-19.
New York City Mayor Bill de Blasio urged New Yorkers to wear masks and keep six feet apart as he warned of a looming second wave of COVID-19 during a Monday press conference. The city's positivity rate has moved in the wrong direction over the past few days, according to de Blasio.
"We have to act immediately to turn this around," he added.
While cases, testing positivity rates and deaths are all rising, they remain far below what New York City experienced in the spring, which de Blasio described as "horrendous." For now, hospitalizations are decreasing. "We did it before," de Blasio said of using masks and social distancing to drive down transmission rates. "We need to do it again right now."
As a new administration prepares to take the helm in Washington, D.C., the United States is expected to surpass a staggering 10 million confirmed coronavirus cases. The expected milestone follows five consecutive days in which COVID-19 cases in the U.S. topped 100,000.
Every state in the country, except for Hawaii, is reporting an increasing number of COVID-19 cases, according to an ABC News analysis of data from The COVID Tracking Project.
Japan and China, by comparison, have reported 109,000 cases and 91,600 cases respectively as of Nov. 9, according to Johns Hopkins University.
ABC News' Soorin Kim, Brian Hartman, Benjamin Bell and Arielle Mitropoulos contributed to this report.
U.S. Secretary of Housing and Urban Development Ben Carson tested positive for COVID-19 on Monday morning after experiencing symptoms that prompted him to get tested.
"Secretary Carson has tested positive for the coronavirus," Carson's chief of staff, Coalter Baker, told ABC News in a statement. "He is in good spirits and feels fortunate to have access to effective therapeutics which aid and markedly speed his recovery."
Carson was tested at the Walter Reed Army Medical Center in Bethesda, Maryland. It was a short visit and he is no longer at the hospital.
Carson was at the White House for the Trump campaign's election night watch party on Tuesday -- an event that was also attended by White House chief of staff Mark Meadows, who also tested positive for COVID-19 last week.
ABC News' Katherine Faulders contributed to this report.
