Hi there hello1234. I am not a kidney transplant patient, but will be listed for a double lung transplant at some point; that is why I am in this group. I looked up the BK virus and read that it is common for it to appear in folks after a kidney transplant. It can be caused by overuse of suppression meds. Sometimes the suppression meds are backed down some to remedy the problem. Please let me me know how you are doing with this. Wishing you you well.