Katie Couric talks with Dr. John Marshall of the Georgetown Lombardi Comprehensive Cancer Center about the growing number of young people being diagnosed with colorectal cancer, and what we should all do to help prevent the disease.

Sign up here for daily email updates from me, Katie Couric, on the news that matters most to you:
https://katiecouric.com/wake-up-call/...

Subscribe to my channel:    / katiecouric  
Follow me on Instagram:   / katiecouric  
Subscribe to my podcast: ApplePodcasts.com/KatieCouric
Follow me on Facebook:   / katiecouric  
Follow me on Twitter:   / katiecouric