I don't know what you are talking about. Last week I had a cold / sinus infection. I couldn't breath and I was coughing. I took a few hits and I felt like a million bucks.
I've smoked while having pneumonia, now that shit is ridiculous. I went two weeks without seeing the doctor, and by then my hoots were fuckin pitiful and my lungs made wierd sounds. Turns out pneumonia is bad