This mechanism makes the Adaptive Immune System actually adapt to the enemy in real time. We asked before how you could keep up with the billions of different enemies that are also able to change themselves. This is one way. A system that can replicate very quickly, that has a defined target and can adapt to it fast, that fine-tunes and improves its weapons until they are perfect. What a beautiful and ingenious solution that shows that the Adaptive Immune System really deserves its name—it truly can beat microbes at their own game.