I've has covid almost every year, to the point the effects are diminishing each time i get it. So that is one potential factor yes, but for a symptom to be 2 years? Then again, I really still don't have an explanation so this very well could be one good potential cause. I got "covid cough" that lasted for a couple months after the first time getting covid, but that was just a constant dry cough. As for meds, I take the same ones I do now for blood pressure and diabetes. But was on these well before and after this occurrence