Juan Williams, a veteran Fox News personality who co-hosts the popular afternoon talk show “The Five,” tested positive for the coronavirus on Thursday and is isolating himself, two people who were briefed on his condition said.Mr. Williams taped a live episode of “The Five” on Wednesday afternoon at Fox News’s Midtown Manhattan headquarters, appearing on the set with several of his co-hosts, including the popular conservative commentators Jesse Watters and Greg Gutfeld. The hosts, like guests on some other cable talk shows during the pandemic, sat about seven feet apart. Mr. Williams left for vacation on Nov. 18 and …
