On Jan. 20, 2020, the first COVID-19 patient in the United States, known as "patient No. 1," was brought to a Washington state hospital.

Dr. George Diaz, the head of infectious diseases at Providence Regional Medical Center in Seattle, treated that patient. Diaz would later learn how to isolate COVID-19 patients properly, how to protect hospital staff and how to treat the illness.

"We used Remdesivir, which was a new anti-viral at the time. He was the first patient to receive this drug in the world, and he had a good response to treatment," Diaz told ABC's "Nightline."

"Patient No. 1" was treated for five days before being released from the hospital, Diaz said. One year later, he is "doing great," Diaz said.

"He's fully recovered and back to his normal life," Diaz said. "Many people survive the illness but have lots of medical problems afterwards. Fortunately, Patient One recovered well."

ABC News’ Lauren Effron contributed to this report.

French President Emmanuel Macron announced that all travelers arriving by boat or plane will have to test negative for COVID-19 before entering the country.

The new measure, which goes into effect Sunday, includes visitors from within the European Union as well as those outside the regional bloc. They must take a polymerase chain reaction (PCR) test up to three days before departure and provide evidence of a negative result before they travel, according to a statement from Macron's office released late Thursday.

People traveling for essential reasons, such as cross-border or ground transportation workers, will be exempt from the requirement. People arriving from other EU member states by train or car will also be exempt.

France has the sixth-highest tally of diagnosed COVID-19 cases in the world, after the United States, India, Brazil, Russia and the United Kingdom, according to a count kept by Johns Hopkins University.

The European nation of 67 million people confirmed another 22,848 cases of COVID-19 on Thursday, along with an additional 358 fatalities from the disease. That brings the cumulative totals to 2,987,965 cases and 71,998 deaths, according to the latest data from France's public health agency.

ABC News' Ibtissem Guenfoud contributed to this report.

When asked during an interview Friday on CNN's "New Day" about whether the Trump administration's lack of truthfulness in some cases regarding the coronavirus pandemic had cost American lives, Dr. Anthony Fauci said "it very likely did."

"I don't want that, John, to be a soundbite, but I think if you just look at that you can see that when when you're starting to go down paths that are not based on any science at all," Fauci, director of the National Institute of Allergy and Infectious Diseases, told CNN's John Berman. "Particularly when you're in the situation of almost being in a crisis with the number of cases and hospitalizations and deaths that we have -- when you start talking about things that make no sense medically and no sense scientifically, that clearly is not helpful."

Fauci, who was a member of former President Donald Trump's coronavirus task force, had disagreed with Trump on how to approach the pandemic. At one point, Trump suggested he was considering firing Fauci.

"There's no secret, we've had a lot of divisiveness," Fauci, who is now the chief medical adviser to President Joe Biden, told CNN. "We've had facts that were very, very clear that were questioned. People were not trusting what health officials were saying."

The National Football League announced Friday that it's inviting 7,500 vaccinated health care workers to attend the Feb. 7 Super Bowl in Florida “to thank and honor them for their continued extraordinary service during the pandemic.”

There are 110,628 people currently hospitalized in the U.S., the fewest since Dec. 14, the COVID Tracking Project reported.

The tracking project said that hospitalizations are decreasing across the country.

"For the first time since November 3rd, no state has over 600 people per million hospitalized with COVID-19," the tracking project tweeted.