A mutant strain of the coronavirus that surfaced in the United Kingdom last month has not been reported in New Jersey — yet. Virus experts are watching warily, conceding that its spread is virtually inevitable. New York State reported Monday that a man in his 60s in Saratoga Springs was the first known case of the virus variant, known as B.1.1.7, in that state. California, Colorado and Florida also have reported cases, in addition to several European countries. To read the full story.