Well, I'm not sure I should respond, but there are so few lymphocyte topics.
I'm no longer on imuran (been years), but I do have very low lymphocytes, much lower than the cutoff, I have idiopathc T lymphopenia. they don't watch the absolute count anymore, since it's pointless once you know if it's B or T lymphopenia, but CD4 and CD8, which are the T Cells, my B cells are fine. I get the same things people who have AIDS get, preventive anitbiotics, but I don't get anti-viral treatment, since I'm negative for AIDS. Why I have it...no one knows...it might go away after a few years...but for now the priority is that I don't get infections. If someone has idiopathic T lymphopenia, I am always looking for someone to talk to who has it too since it's very rare.