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After digging through the data, I've come across what's called the integrated airway hypothesis (what Doc referred to as one airway one disease) A study from the Allergy and Asthma Medical Group and Research Center showed by doing a metanalysis of several studies that 19 to 38 percent of patietns with rhinitis also have asthma.
The belief is that local inflammation in the upper airways by an allergen also causes inflammation in the lower airways leading to worsening of asthma. The same metanalysis of the data showed a moderate improvement in asthma symptoms in those who had their allergic rhinitis appropriately treated.
I learn something new everyday!!!!!
Erik
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