i'll tell you what's excite, we've fwn relying on a drug called enter ferron. you have to give it by injection. it takes a year to work. half the people who get it for hepatitis c don't respond, the other half have to go off. some people with chronic diseases can't take it. for the very first time we're able to take protocols that don't use it, use this drug instead. what this does, it prevents the virus from replicating, making more of itself and spreading to other cells. there was a 95 to 100% response over 12 to 24 weeks. when they took patients and studied them later, they found for the most part the virus disappeared. this is a cure. for cirrhosis or liver disease, you want to prevent this. >> how prevalent is hepatitis c. >> 15,000 deaths from liver failure and cirrhosis. as surgeons we're more scared of hepatitis c than hiv. >> why? >> blood transmission, needle stick, there's no vaccine for it it. you want to be very careful. can lead to cirrhosis, scarring of the liver, more important cancer of the liver, which is a deadly position to be in. having thi