Trump tests positive for COVID-19: What are his symptoms? Who else is infected? Here's what we know.

President Donald Trump spent his first night at Walter Reed Military Medical Center after he and first lady Melania Trump tested positive for COVID-19,.

His positive test came hours after Hope Hicks, a White House aide with whom Trump had recently traveled, had also tested positive.

Trump was taken by helicopter to the hospital outside Washington, after he started showing symptoms. Melania Trump did not join the president for the hospital stay.

Vice President Mike Pence and his wife Karen tested negative for the virus Friday morning, his press secretary Devin O’Malley tweeted. Including Hicks, at least 10 other people in close contact with Trump have tested positive for COVID-19.

Ivanka Trump and her husband, Trump senior advisor Jared Kushner, tested negative, according to a tweet from Special Assistant to the President Carolina Hurley. The Trumps' 14-year-old son Barron also tested negative, White House spokeswoman Stephanie Grisham told USA TODAY.

Later Friday, Democratic presidential candidate Joe Biden and his wife Jill tested negative for COVID-19, his personal doctor announced Friday in a tweet.

In the United States, more than 7 million people have been diagnosed with COVID-19 and over 200,000 have died from the disease. This is what we know so far:

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What are Trump’s symptoms?

White House physician Dr. Sean Conley said in a memo Friday afternoon that "the President remains fatigued but in good spirits."

The president received a single 8 gram dose of Regeneron's experimental polyclonal antibody cocktail as a precautionary measure, Conley said. The antibody cocktail is currently being studied in four late-stage clinical trials and its safety and efficacy have not been fully evaluated by any regulatory authority, the company said on its page.

He also was being treated with remdesivir, a drug that has shown effectiveness in shortening COVID-19.

Hours after arriving at Walter Reed National Military Medical Center for treatment, the White House released a memo from Conley indicating that Trump didn't need to be put on oxygen. However, Trump did start remdesivir therapy, which is used for hospitalized adults who need oxygen but are not sick enough to require ventilation.

Conley noted Trump had completed his first dose and was "resting comfortably."

President Trump hospitalized at Walter Reed after testing positive for COVID-19

This shows a White House memorandum released Thursday, Oct. 1, 2020 by the Physician to the President, confirming that both President Trump and first lady Melania Trump have tested positive for the SARS-CoV-2 virus.
This shows a White House memorandum released Thursday, Oct. 1, 2020 by the Physician to the President, confirming that both President Trump and first lady Melania Trump have tested positive for the SARS-CoV-2 virus.

In an 18-second video posted to Twitter Friday evening, Trump addressed the nation and said he was "doing very well."

"I want to thank everybody for the tremendous support. I'm going to Walter Reed Hospital. I think I'm doing very well, but we're going to make sure that things work out. The first lady is doing very well," he said. "I appreciate it. I will never forget it. Thank you."

Trump followed up hours later with another health update on Twitter, writing, "Going welI, I think! Thank you to all. LOVE!!!"

Because of his age and obesity, Trump is in two very high-risk groups for developing severe COVID-19 disease, hospitalization and death, according to the CDC.

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Who else could have been infected with the coronavirus?

Trump and his adviser Hope Hicks have been in close contact with dozens – if not hundreds – of other people while potentially infectious with COVID-19, a USA TODAY analysis shows.

At least 10 other people who were in close proximity with them have also tested positive:

  • Bill Stepien, Trump’s campaign manager

  • Republican National Committee Chairwoman Ronna McDaniel

  • Sen. Mike Lee, R-Utah

  • Sen. Thom Tillis, R-North Carolina

  • Three White House reporters

  • One White House staffer

  • Kellyanne Conway, former White House senior advisor

  • The Rev. John Jenkins, president of Notre Dame University (Jenkins was at the White House Saturday, when Trump introduced Judge Amy Coney Barrett as his Supreme Court nominee. Barrett was a law professor at Notre Dame for 15 years before Trump nominated her to the U.S. Court of Appeals for the 7th Circuit.)

Trump took part in a fundraiser and a roundtable in Bedminster, New Jersey, earlier in the day Thursday. He also recently appeared at a rally in Duluth, Minnesota, on Wednesday. Before that, he traveled to Cleveland, Ohio, on Tuesday for the first presidential debate with Democratic nominee Joe Biden.

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Will the presidential debates get postponed?

It remains unclear whether the second presidential debate, a town hall format set for Miami on Oct. 15, would move forward as planned.

The Center for Disease Control and Prevention advises anyone who tests positive for the virus to avoid contact with others for 10 days after symptoms first appeared and until fever symptoms have been gone for at least 24 hours. They also recommend anyone exposed to someone who tested positive for the virus quarantine for at least two weeks.

Representatives of the Commission on Presidential Debates did not immediately respond to requests to comment from USA TODAY about the future of the debates.

What does it mean for the pandemic response and 2020 election?

Trump testing positive has the potential to upend his all-is-well messaging on the pandemic while throwing an already contentious election into further disarray. Trump has argued for weeks that the nation had "turned the corner" on COVID-19, despite spiraling case counts, and often asserted Americans had the pandemic "under control" as he pressured states to open schools and businesses.

As well as major implications for the president's messaging, the announcement will also have an impact on the logistics of his schedule just weeks before the Nov. 3 election. The revelation of his positive result raises questions about his ability to hold rallies, fundraisers and participate in presidential debates scheduled later this month.

More: President Donald Trump's coronavirus test result could alter his reelection campaign, undercut pandemic messaging

Contributing: Cydney Henderson, John Fritze, Elizabeth Weise, Jessica Menton, Leora Arnowitz, Joey Garrison

This article originally appeared on USA TODAY: Donald, Melania Trump COVID positive, Biden negative: What we know