UPDATE, 2:07 PM: ESPN responded to a question asking what is the plan while Keith Olbermann is out sick with a statement from Olbermann: “I’m day to day. We’re all day to day.” We hear Quinn is filling in — at least tonight.

keith-olbermann_20110705164910PREVIOUS, 11:50 AM: First Bob Costas was felled by pink eye – now Keith Olbermann has succumbed to shingles. Viewers who learned the ESPN host was out Wednesday night may have thought “here we go again” but Olbermann took to Twitter today to assure them he’s not engaged in another death match with his employer – he’s suffering from shingles, suggesting it was fate’s way of punishing him for falling out of the 25-54 demographic last week when he celebrated his 55th birthday. Shingles is a viral infection that causes a painful rash and that is itself caused by the chickenpox virus that stays in the body for years. In 2003, CBS late night star David Letterman was out for about a month with shingles.

Olbermann’s tweets: