I used to make fun of advertisements for cleaning products that promised to keep your home sterile, based on lessons I had learned from my late grandmother about how over-sterilization leads to more infection. More and more doctors are coming on board and agreeing that a sterile environment ultimately weakens the immune system. When you go abroad and everyone is just fine but you suddenly get sick, it’s precisely because of this over-sterilization. However, I have come to have second thoughts about this but particularly to one aspect of life — going to see films and presentations where you are given 3D movie glasses.

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