WASHINGTON — The White House moved to reassure Americans on Thursday that President Biden is suffering from only a mild bout of COVID-19 and that, while he will undergo the necessary five-day isolation, the business of governing will go on as usual. White House press secretary Karine Jean-Pierre said Biden started feeling fatigued on Wednesday evening, after returning to Washington from a trip to Massachusetts to deliver remarks on climate change. COVID-19 response coordinator Ashish Jha with White House press secretary Karine Jean-Pierre on Wednesday. He had avoided several encounters with the coronavirus throughout his presidency, but there was a feeling within the White House that it was only a matter of time before he contracted the pathogen. “It’s going to be OK,” Biden said in a video recorded in the White House residence and shared on the presidential Twitter account.