Theresa , I had labs and CT this morning and will have Hematology and Oncolgy appointments next week. But just looking in my portal at this morning's test results, the blood tests are all back in the normal ranges. The chest fluid ( pleural effusion ) has gone away. The Spleen is smaller per the CT report and I can also tell it is smaller as I cannot physically feel it anymore. From my perspective, today's tests are good, but  I need to hear it from the doctors.  I do have a slight discomfort in the spleen area, different than it was. Am guessing that is the healing process??? When people ask.... I say   " Age adjusted, I feel great"
We're trying to isolate and wear masks and be careful. So far I have not had any infections, covid or flu. I did receive the covid antibody Evusheld injection after the infusions. I guess the immune system takes a long time to recover from rituximab 3 months to a year. So I will be cautious for a while yet. My family knows I am being cautious and have been helpful and understanding of my situation. 
I was diagnosed with SMZL in June of 2019 and looking back at the blood tests, the Dr thought I probably had it in 2017.
I hope I have answered all your questions let me know if there is anything else. Where are you getting treatments? How many treatments will you get? Hope your infusions go well. ...even the first one. 
Thanks for checking in. This forum has been quiet for a while. I wonder how everyone else is doing?.