I've read here (and elsewhere) reassuring comments that reaction to BCG means it's working, which may well be true. Not having a reaction doesn't necessarily mean it isn't working, however. I had milder reactions to BCG than many others here have reported, was able to complete the full course of initial treatments and follow-ups, and have remained all clear of bladder cancer for 6 years. Part way through the course of treatment, I did get a pretty high fever one time. That was enough for my urologist to drop subsequent treatments to 1/3rd dose. If your husband develops severe reactions to the BCG, e.g, very bad bladder irritation, the dose can be dropped to 1/3 or even 10% and still be effective.
Best of luck to your husband, and to you.
Ann
Small TA Grade 1, May-06; recur (2 tiny), same, June-08; TURBTs both times. BCG begun July-08, dosage to 1/3rd May-10, completed treatment December-11. All clear since 2008.