As unborn babies, we live in an environment that is normally completely germ-free — the womb. For nine months, we have no contact with the outside world, except through our mother. Our food is pre-digested; our oxygen is pre-breathed. Our mother’s lungs and gut filter everything before it reaches us. We eat and breathe through her blood, which is kept free of germs by her immune system. We are sheathed in an amniotic sac and encased in a muscly uterus, which is corked with a thick plug like a big earthenware jug. All this means that not a single parasite, virus, bacterium, fungus — and
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