Why Are Asthma Rates Soaring?

Asthma rates have been surging around the globe over the past three decades, and for a long time researchers thought they had a good idea of what might be fueling the increase: the world we live in is just a little too clean. According to this notion–known as the hygiene hypothesis–exposure in early childhood to infectious agents programs the immune system to mount differing highly effective defenses against disease-causing viruses, bacteria and parasites.

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Why Are Asthma Rates Soaring?