But now Corona virus fears may be changing all that.

Actress Rita Wilson, known for her warm greetings, avoided all physical contact on the red carpet for a fund raiser, noticed her class pans.

She called it a cautionary measure.

I'm seeing that that handshakes air down, that air kisses are up and even air kisses that that used to be a bit more closer.

There's a lot more space, a lot more air and also just a lot of cautiousness.

Etiquette in the days of the Corona virus is becoming a real dilemma, and not just for celebrities.

How are you supposed to say hello to a friend or business associate without putting yourself at risk?

Today at the University of Nebraska, where 15 Corona virus patients have been quarantined, experts demonstrated another greeting.

An elbow touch.

I spoke to workplace expert Stephen Viscusi.

The handshake is out.

It's a polite bob of the head or about that's it.

What do you do if I go in for the handshake?

Yeah, I immediately step back and say no, and I just smile like this.

Once they see those hands, they understand.

Nobody wants to shake hands today.

Some health officials have suggested maybe an elbow bump.

What do you make of that?

An elbow bump?

What are you talking about?

The same elbow that I'm gonna cost into and then you want me to bump it?

It's the Corona virus.

Across the TV airwaves Monday, host like Kelly Ripa and Ryan Seacrest kept up their cozy hellos.

On.

In Italy, 83 year old Pope Francis made his first public appearance in four days after raising fears that he had caught Corona virus during his weekly blessing, the pope said it was just a cold.