Thanks a lot for the tips iPoop and Jane974. Very helpful
. Also, iPoop i think Azathioprine mechanism is a little weird. My WBC usually goes up in around a week once i stop my Aza. For UC , i think it takes 6-7 weeks to initially work. Once it starts working, even if you stop for a week, you can still get the therapeutic affect shortly after resuming it(I guess the Aza momentum lasts for a few weeks). These are just my personal experiences.
Do you know what Aza does to B-cell and T-cell? I heard some doc say that they are the ones that are important for fighting viral infections initially and not WBC