CNN’s “The Lead” host Jake Tapper corrected Joe Biden during an interview Tuesday when the former vice president covered a cough with his hand. “Excuse me,” Tapper said. “You know, you’re supposed to cough into your elbow… I learned that actually covering your White House.” “No, actually that’s true, but fortunately I’m alone in my home,” Biden replied. “But that’s okay. I agree, you’re right.” “It’s kind of old school to do it with your hand. Do it into your elbow, you’re supposed to do it,” Tapper added, President Trump got a similar lesson last week when he moved to shake someone’s hand.