Treatment periods and treatment breaks The treatment with IL-2 and Ceplene lasts for 81 weeks and is cyclic. • For the first 18 weeks: you will use IL-2 and Ceplene daily for 3 weeks, followed by a 3 week break (no treatment at all). • For the following 63 weeks: you will use IL-2 and Ceplene daily for 3 weeks, followed by a 6 week break (no treatment at all).