Anybody had Immunotherapy?

I never heard on this board that somebody was undergoing onc prescribed Immunotherapy alone or together with chemo and/or radiation. Specific drugs stimulating the Immune system, Cancer vaccines, high dose of infusional Vitamin C, etc., many of these therapies approved by the FDA, successfully applied somewhere, as we see/hear in the news but not here. It would be interesting to hear if somebody has/had that and what results.
Best wishes to everybody,
Steven