Feb 12, 2014 7:25 PM by Annie Snead
Bob Costas has taken two nights off from Olympics coverage.
The prime-time host has been battling a stubborn eye infection since the Olympics began and has been wearing glasses.
The infection started in his left eye and has now spread to his right eye.
Tuesday morning on "Today," Costas told the anchor team that he's doing "worse."
We spoke with a doctor at Memorial Hospital who says it can be very irritating and itchy - which would be tough to deal with on camera.
It's pretty common and highly contagious. You can get it from rubbing your eye after touching an object that someone else with pink eye has come in contact with or from sharing make-up.
And you typically just have to let it run it's course.
"Most viral infections are self limitating meaning that they will go away on their own and no treatment is necessary other than symptomatic which can include warm compresses and a wash cloth to wipe away the discharge," said Kathy Cook with Memorial Hospital.
In some cases antibiotics are needed and you can't wear your contacts.
Pink eye is often related with respiratory infections, like a cold, and washing your hands is the best way to prevent it.