WASHINGTON (Reuters) -U.S. Secretary of State Antony Blinken tested positive for COVID-19 on Wednesday, the U.S. State Department said, adding that he was experiencing mild symptoms. The top U.S. diplomat, who is fully vaccinated and boosted, has not seen President Joe Biden in person for several days and therefore Biden is not considered a close contact, the department said in a statement. “The Secretary will isolate at home and maintain a virtual work schedule. He looks forward to returning to the Department and resuming his full duties and travels as soon as possible,” the statement said. I…