An immune system is like a crumple zone on a car, it can stop you dying, but you don’t smash randomly into…

An immune system is like a crumple zone on a car, it can stop you dying, but you don’t smash randomly into every car you see. It’s a last line of defence, after speed limits, driver training, road rules etc. ‘Natural’ healthers think it makes the car stronger with every crash. https://t.co/5BdA0wWlGY