[Paradox]

From my understanding, the theory is that our immune system is so primed to attack infection, that, lacking what was a normal barrage of infectious enemies to attack, the immune system becomes hyper sensitive, and over reacts, or even begins attacking the bodies own cells (autoimmune diseases, which are becoming rampant).

[Praxeologue]

the theory is that our immune system is so primed to attack infection, that, lacking what was a normal barrage of infectious enemies to attack, the immune system becomes hyper sensitive, and over reacts, or even begins attacking the bodies own cells

So, at a certain age, should we all be exposed to a low-level variety of infectious agents in order to give our immune system a good workout, on a similar principle to the flu shot?