More than 13 million people have tested positive for COVID-19 in the U.S., according to Johns Hopkins University.

The U.S. crossed 12 million cases six days ago.

Experts have cautioned against reading too much into data reported before next week, as some state updates may be spotty due to the Thanksgiving holiday.

Vermont officials are urging people who had Thanksgiving gatherings with those outside their household to now quarantine.

“My request to Vermonters who may have participated in travel and/or multi-household gatherings is simply this: Please quarantine yourselves at home, and please get tested now and in seven days,” state Health Commissioner Dr. Mark Levine said during a press briefing Friday.

Gov. Phil Scott echoed the health commissioner’s request.

“If you have had one of those gatherings yesterday, then you shouldn't send your kids to school next week," he said. "You should quarantine your kids for at least seven days, get a test, and then we'll move forward."

Scott said earlier in the week that school officials will ask returning students if they attended a Thanksgiving gathering with people outside their household to determine quarantine requirements.

"We did all of this to try and protect Vermont, to try and prevent the rise in the number of cases," Scott said Friday.

ABC News' Joshua Hoyos contributed to this report

The Baltimore Ravens-Pittsburgh Steelers Thanksgiving Day game, which was moved to Sunday due to a COVID-19 outbreak, has been postponed again -- to Tuesday.

"These decisions were made out of an abundance of caution to ensure the health and safety of players, coaches and game day personnel and in consultation with medical experts," the NFL said in a statement.

The move comes after eight Baltimore players were publicly put on the reserve/COVID-19 list this week, including defensive end Jihad Ward as of Thursday.

The list means either a player tested positive for COVID-19 or has been identified as a close contact of someone who did.

Though according to ESPN, at least 12 Ravens players have tested positive for COVID-19, including NFL MVP Lamar Jackson.

Brazilian President Jair Bolsonaro insisted he will not take a COVID-19 vaccine.

"I'm telling you, I'm not going to take it. It's my right," Bolsonaro said Thursday in a live broadcast streamed on various social media platforms.

The right-wing leader also said that Brazil's National Congress is unlikely to require citizens to get vaccinated for COVID-19, and he expressed skepticism over the effectiveness of face masks in curbing the spread of the virus.

Bolsonaro, an avid supporter of U.S. President Donald Trump, has downplayed the seriousness of the coronavirus pandemic despite getting infected himself over the summer.

Brazil has the second-highest number of COVID-19 deaths in the world, behind only the United States, and the third-highest number of confirmed cases, after India and the United States, according to a real-time tally kept by Johns Hopkins University.

A COVID-19 patient whose lungs had been severely damaged by the virus has made a miraculous recovery after undergoing a double lung transplant at a Texas hospital.

Paul Rodriguez, 52, of San Antonio, had no pre-existing conditions when he contracted the novel coronavirus and fell ill with pneumonia in July. Rodriguez was hospitalized at an area hospital in his hometown and required intubation as well as the use of a ventilator. Then in mid-September, Rodriguez was transferred to Baylor St. Luke's Medical Center in Houston for evaluation, "as it became clear that a lung transplant was his only chance of survival," according to a press release from the hospital, which said the patient had "irreversible lung damage."

Rodriguez was approved for a transplant and, within a week of listing, he received a brand-new set of lungs on Oct. 15. After being successfully weaned off the ventilator and oxygen support, Rodriguez underwent rehabilitation at Baylor St. Luke's Medical Center and was discharged on Nov. 24. He is expected to continue the rehabilitation program as part of his recovery, according to the press release.

"Rodriguez is the first double lung transplant the hospital has performed on a coronavirus patient since the pandemic began," Baylor St. Luke's Medical Center said in a statement. "To date, only a handful of transplant centers in the U.S. have performed lung transplants on patients due to irreversible lung damage caused by the virus."