President Donald Trump will face a critical turning point in his battle with COVID-19 in the coming days as he remains at Walter Reed National Military Medical Center on Sunday. He announced early Friday that he and first lady Melania Trump tested positive for the virus.

Saturday brought a number of mixed messages about Trump’s health. After White House physician Sean Conley said he was “extremely happy” with Trump’s progress, White House chief of staff Mark Meadows told The Associated Press that Trump’s condition in the past day had been “very concerning.”

On Saturday evening, Trump tweeted a video of himself telling the American people that he’s “starting to feel good,” but he acknowledged the coming days would be “the real test.” Doctors say that’s because an imbalanced immune response during this time can have life-threatening consequences. 

Trump worked “most of the afternoon” Saturday and was moving around his medical