I was diagnosed September 2022 with same as your husband, nsc, stage iv, only in lungs. Was in clinical trial all winter but the trial drug showed no positive effect. Currently am on same three drugs as your husband, third infusion tomorrow. Hopefully will get through this third and fourth infusion. After it’s supposed to be keytruda and pemetrexid on maintenance basis. I also was in good health before last year. My p c p kept treating me for pneumonia all last summer. I wish your husband better health and a good recovery.