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It depends. There are rumors that allegies of our days are caused by exaggerated hygiene.

You have to wait of few hundred years to see all the consequences of technology in retrospect.

There are rumors that the lack of infectious disease in modern society is also caused by exaggerated hygiene.

no this is a fact

There are rumors the current lack of infectious disease is really just an intensely selective breeding ground for much more effective infectious disease.

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