dr anthony falcii leads the treatment. >> there has been treatment, but it has not been overwhelmingly effective. it has had considerable toxicity. >> traditional treatment involves months of interferon injections causing flu-like sympto symptoms, anemia. the cure rate is 40%. >> when you underwent treatment, what side effects did you endure? >> the side effects are an intense chilling sensation that you can't get rid of. you can't warm up. you freeze from the inside out. you but blankets on, but you are cold inside. you are shivering under a blanket. >> dan tried various treatments and cleared the virus in 2012. after seven failed treatments and a brush with death, clyde underwent a liver transplant, a combination of trucks with painful side effects are treating him. >> joan is still fighting. >> i did four main treatments, and an experimental treatment. i was the only patient and that was one where my skin came off, not just the top layer, and the skin came off. and there was one where i threw up for, like, eight straight hours, and it subsided. >> the f.d.a. approved a new treatment