I had Lyme disease first and then several years later developed leukemia. I am convinced that the two are related. In Britain, a longitudinal study was performed that shows that after outbreaks of the flu the incidence of leukemia spikes. Extrapolating from that, I figured that having a very strong immune response could in and of itself increase the possibility of leukemia. But I have also noted on websites that Bb may result in new genetic material being introduced into our cells, and that it does impact the immune cells.