US President Joe Biden has tested positive for Covid-19 for a second consecutive day and continues to deal with a rebound infection. Emma O'Brien reports on Bloomberg Television.
University of Virginia immunologist and COVID-19 researcher Dr. William Petri continues to answer reader questions about COVID-19 and, now, monkeypox. Send your questions to Lynne Anderson at vanderson@dailyprogress.com, and she will forward them to Dr. Petri.