During the 1950’s, asthma affected 1% of the population but the current rate is 10% in developed countries. Asthma kills 3500 people each year in the US annually. Immigrants living in developed nations have higher instances of asthma than their relatives who have stayed in their countries of origin, and it is theorized this occurs because of the hygiene hypothesis, which states that those who are exposed to more germs therefore acquire more antibodies. Researchers within the New Zealand Dundine ...
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