Thanks, Merry. I think the term is "cautiously optimistic". I haven't had a CT/PET Scan since treatment began. My lung cancer had metastasized in my chest and neck lymph nodes. Some of them were visible (which made a biopsy real easy!) and those have all but disappeared. I have my fourth infusion on 12/28 and then a CT the day of infusion #5 on 1/18 so we'll have some indication then. But like Tom Petty said, "the waiting is the hardest part"!