They made up "hybrid immunity" to sell you gene therapy. They really did. No one held such a belief, nor were there ANY studies nor ANY theory. You will never magically find the theory in old journals or old textbooks. NEVER. In fact, and well documented at that, it was considered DANGEROUS to vaccinate someone who might have the disease at the moment, or recently had it. Oh, that's true. Can't be erased. Poorly little tards. There is a magic sea change in your textbooks and papers, when the "hybrid immunity" theory was made up by big pharma and shit-ass actuary math. Congrats.