Transcript for Alex Trebek encourages fans amid cancer news: 'Keep the faith'

Finally here, I've been reading your messages on Twitter, an outpouring for Alex trebek tonight, vowing to fight this cancer with everything he has, including his wit. With the help of your prayers also, I plan to beat the low survival rate statistics for this disease. Truth told, I have to. Because under the terms of my contract, I have to host "Jeopardy!" For three more so help me. Keep the fifth, and we'll win. We are with you, Alex. The country pulling for you

This transcript has been automatically generated and may not be 100% accurate.