Grayson agrees with Khurana that within the early days of the COVID-19 pandemic, there was a lot concern that bronchial asthma may very well be a danger issue — an affordable suspicion, on condition that the coronavirus attacks the lungs.
However every part that got here out of the preliminary epidemic in China urged that bronchial asthma was not a danger issue for life-threatening COVID, Grayson mentioned, and the info continued to verify that because the coronavirus unfold throughout the globe.
“It isn’t there within the knowledge. Whether it is there, it is extraordinarily small danger. It is nothing I can see,” he mentioned.
Researchers have speculated that individuals with allergy-driven bronchial asthma may need some safety in opposition to COVID, as a result of manner the coronavirus infects the physique.
The SARS-CoV-2 virus that causes COVID-19 enters lung cells by participating with a sort of protein on their floor referred to as an ACE2 receptor, Khurana mentioned.
“Within the setting of an allergic sort of inflammation, the expression of the ACE2 receptor seems to be downregulated. It seems to be decrease. There’s not as a lot receptor,” she mentioned.
As a result of there aren’t as many ACE2 receptors accessible, individuals with allergic bronchial asthma won’t be as weak to extreme an infection, Khurana mentioned. This principle additionally might assist clarify why different persistent ailments seem to extend COVID danger, she added.
“Sufferers in circumstances like diabetes or hypertension, this receptor expression is elevated,” Khurana mentioned. “That is a potential motive why these comorbid ailments are at particularly excessive danger for this an infection.”
However that solely explains why allergic bronchial asthma is not a serious danger issue for extreme COVID, Grayson mentioned. It does not clarify why some research are discovering elevated danger amongst individuals with non-allergic bronchial asthma.
Grayson suspects that the purported hyperlink between non-allergic bronchial asthma and COVID present in these research is definitely a hyperlink between a COVID and a number of various lung illnesses, particularly COPD.
“There are research exhibiting that COPD will increase your danger of extra extreme COVID, not markedly however a little bit bit, to not the extent of issues like hypertension and diabetes and [being] aged,” he mentioned. “I am involved that what they’re calling non-allergic bronchial asthma really is COPD, which might skew their knowledge.”