President Trump is not out of the woods yet and, according to Dr. Anthony Fauci, director of the National Institute for Allergies and Infectious Diseases, is experiencing a “reversal” in his progression of Covid-19 disease.

“I’m not involved in his basic services,” Fauci told CNN’s Chris Cuomo on Monday evening. “But the problem is, he’s still early enough in the disease that it’s no secret that you can have a reversal, sometimes looking at the clinical course of people when you’re five to eight days old,” said Fauci.

“Reversing means going in the wrong direction and getting into trouble.”

Trump left Walter Reed National Military Medical Center late Monday afternoon to return to the White House, saying he was feeling fine.

“It’s unlikely to happen, but you have to adjust to it,” said Fauci, a member of the White House’s coronavirus task force. “He knows. The doctors know. So they’ll keep an eye on it. They’ll try to do this within the confines of the White House as opposed to the hospital.”

Doctors know that coronavirus patients can feel better and then get worse.

“You’re not out until you have several days off and are doing well, but he definitely looks very good. I mean I don’t have to tell you this. You saw him come out of the helicopter, ”Fauci said.

Trump left Marine One on the White House lawn and climbed the White House stairs unassisted – an unusual entrance – stood up, removed his mask, saluted, and then entered the building.

“He looked like he was in pretty good shape,” said Fauci.