It all comes down to an immune system protein known as interleukin-13.
. Allergic asthma symptoms are triggered by allergens such as pollen or pet dander. Other types of asthma can be set off by exercise, weather or breathing in irritants such as strong perfumes, cleaning fumes or air pollution.
But as the pandemic progressed, researchers noticed that people with allergic asthma weren’t developing severe COVID-19 as often as expected. Here’s a look at why that may be.What sets allergic asthma apart from other types of asthma and COPD is a protein called interleukin-13, or IL-13. “In the case of [allergic] asthma, the body is making a mistake. It’s mistaking a harmless substance, like pollen, for a worm,” says Burton Dickey, a pulmonologist at M.D. Anderson Cancer Center in Houston who was not involved in the study.
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