Answer:
viral
Explanation:
It can not be an allergen since they don't cause infections. Only thing left is viral.
Home fires are caused by mostly lack of observance. That’s my guess... sorry if this is not what you are looking for
lungs can’t remove enough of the carbon dioxide (CO2) that the body produces
Excess CO2 causes the pH of your blood and other bodily fluids to decrease, making them too acidic.
This is called respiratory acidosis