<s>[INST] My father has B cell lymphoma his white blood count is 67,000 red blood 4.02 and his potassium level is 2 he is taking IVIG treatments his Dr is very good. But I m am always with him and cant ask him what to expect and what I can do to make him more comfortable. I am his caregiver and I also a profession caregiver to other pts. Thank you. [/INST] Hi, dairy have gone through your question. I can understand your concern. Your fathers' potassium level is very low. Life-threatening arrhythmia can occur with this level.  He should be given potassium supplements for that.  For b cell lymphoma chemotherapy should be given according to stage and spread. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. </s>