CNN's Jake Tapper Jacob (Jake) Paul TapperPence aide dismisses concerns rushed vote on Trump nominee will hurt vulnerable senators Klobuchar: GOP can't use 'raw political power right in middle of an election' The Memo: Media accused of using kid-gloves on Biden MORE scolded Joe Biden Joe BidenBiden leads Trump by 36 points nationally among Latinos: poll GOP set to release controversial Biden report Can Donald Trump maintain new momentum until this November? MORE for not coughing into his elbow, instructing the 2020 Democratic front-runner for the presidential nomination on the recommended way to avoid spreading germs during the coronavirus pandemic.

The instructions from "The Lead" anchor came after Biden loudly coughed into his hand not long after the nationally televised remote interview from Biden's home in Delaware began.

"You know, you're supposed to cough into your elbow. I don't know, sir. I learned that, actually, while covering your White House," Tapper said.

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"No, actually — actually that's true, but fortunately I'm alone in my home. But that's OK. I agree, you're right," Biden replied.

"It's kind of old school to do it into your hand. Do it into your elbow, you're supposed to do it," Tapper reiterated.

Presidential candidate Joe Biden shares how he's following the coronavirus protocol with his grandchildren.



"They sit out in the backyard and we sit on the porch and I bribe them with ice cream... but I'm not able to go down and hug them and kiss them which I usually do." pic.twitter.com/LhIUMFUZH3 — The Lead CNN (@TheLeadCNN) March 24, 2020

Biden also coughed into his hand during a debate with Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) on CNN earlier this month. Tapper was moderating that event along with chief political correspondent Dana Bash Dana BashTrump says officials will investigate whether California is using 1619 Project in classrooms Veterans Affairs secretary defends Trump: 'I judge a man by his actions' GOP senator dismisses national intelligence director election security briefings: 'This is blown way out of proportion' MORE.

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The Centers for Disease Control and Prevention (CDC) says that anyone who coughs should cover their "mouth and nose with a tissue" or sneeze into the inside of their elbow.

The CDC also says coughers should "immediately" wash their hands "with soap and water for at least 20 seconds."

"If soap and water are not readily available, clean your hands with a hand sanitizer that contains at least 60% alcohol," it adds.

Biden also revealed he had not been tested for coronavirus, citing no symptoms.