More grist for the "Is Biden Alive" mill

He was in Las Vegas and gave a speech afterword he suddenly left town and flew to his home and has not been seen since. His doctors said he had COVID. Then the suspicious note saying he dropped out of the race then the silly AI voice extolling Round Heels Harris then we learn that he ditched meeting the Israeli PM and has cancelled at least 9 scheduled appearances. Is he still alive? Maybe his heart is still beating but his brain checked out?