Roberta Rampton

Updated at 10:20 p.m. ET

President Trump on Monday revealed to reporters that he has been taking hydroxychloroquine and zinc to protect against the coronavirus.

"I was just waiting to see your eyes light up when I said this," the president told reporters, volunteering the information at the end of a roundtable with restaurant owners.

Trump said he asked his doctor about taking it after hearing from people who had done so. "Here's my evidence — I get a lot of positive calls about it," he said.

Two weeks ago, President Trump entered the White House briefing room and announced an aggressive plan to slow the spread of the coronavirus.

Stay home for 15 days, he told Americans. Avoid groups of more than 10 people. "If everyone makes this change, or these critical changes, and sacrifices now, we will rally together as one nation and we will defeat the virus," he said.

Updated at 8:03 p.m. ET

The White House disclosed its first case of the coronavirus on Friday night: a person who works in the office of Vice President Pence.

"Neither President Trump nor Vice President Pence had close contact with the individual," Pence spokeswoman Katie Miller said in a statement. She declined to give further details.

"Further contact tracing is being conducted in accordance with CDC guidelines," Miller said.

Updated at 4:14 p.m. ET

President Trump announced new coronavirus guidelines for at least the next 15 days, including that Americans should avoid groups of more than 10 people.

In a briefing at the White House on Monday, he also urged people to avoid discretionary travel and going out to bars, restaurants and food courts. He recommended that schools close.

The stricter guidelines marked a shift for the president, who has repeatedly stated that the virus is under control.

"Whatever it takes, we're doing," Trump said.

Updated at 8:00 p.m. ET

States hit hardest by the spread of coronavirus will see drive-through and walk-through testing sites set up this week, the White House said on Sunday, a shift that will provide more information about how widely the virus has spread across the country.

The sites each will be able to screen 2,000 to 4,000 people per day, with priority given to health care workers, first responders and people age 65 and older with respiratory symptoms and fevers above 99.6 degrees.