When the pandemic hit, Robert was assigned the overnight security shift, guarding healthcare providers, many of whom are completing a 12-hour-shift.

Their work is dangerous and can be depressing, particularly when some patients don't survive.

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"We have a lot of things thrown at us all the time where we work on high stress levels...," Kelly Wilson, a nurse who works in the neonatal intensive care unit, told CNN.

Robert and NICU Nurse Kelly Wilson photo: cnn.com

"Maybe some people feel defeated leaving work, and he (Robert) just gives that extra energy to be positive."

What does Robert do? With a big smile, he warmly greets everyone, and he reminds them how important their work is.

"And I show a lot of appreciation for that," he told CNN. "That's why I try to bring out a smile. Look what you have done!"

How important is this?

"I think it was a month into it, it was being consistent, and we were having conversations about it in our unit," said nurse Kelly.

"The co-workers were like, 'Oh, man! I can't wait to get off work and see that guy!'"

Robert Johnson greets the staff photo: cnn.com

In fact, it's almost like a party.

"I'm telling you..., when they come out, you'd think we're throwing a party. It's a celebration!" said Robert.

"Another nurse may give me a bump this way, and I'll bump that way. One doctor did a little dance and the bump. Everyone is coming out with a different way of greeting."

With all the crisis's medical providers face, this stress release is just what the doctor ordered.

Editor's Note:To learn more, click here.

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