Question about folks on Imuran being immuno-compromised or not

Hi folks,

This is something I have been wondering for quite a while. I am on imuran 100mg dose. My wbc is in the range of 3.5-4.5. I am not sure if wbc is the sole marker for immunity. Anyway I see labels on certain products(Eg. Saccharomyces boulardii probiotic which probably could help with my issues) which says that immuno-compromised people may get serious infections from it. Questions:
1. Am i immuno-compromised?
2. Generally, is there a risk of taking probiotics like boulardii for folks on imuran? Anyone ever faced an issue?

I know nobody can answer these questions definitively but as always your insights are extremely helpful

I was on it (150 mg) about 12 years before my liver had had enough. I always considered myself immunocompromised. Case in point, one year a simple cold virus and stress led to shingles at age 39. I didn't get sick often, but it would take a while to recover, so there were some doozies in there. I was diligent about hand sanitizer, washing hands, and not serving in our church nursery. Wounds are always slow to heal but I think that's more the Colazal I take.