I suffered with, first, the morning cough and, next, the all day one during my 58+ years smoking. The body has multiple ways of protecting itself by walling off irritation depending on its location. In the lungs, or whole respiratory system, that's mucous. My cough and/or mucous is gone since I started vaping. I, also now, no longer inhale anything but air into my lungs if I can avoid it.... that includes air fresheners, hairspray, harsh cleaning products, etc. I never want all that mucous in my life again!!!! We're living in a society that is way dysfunctional in which smoking tobacco and its mucous cough is deplorable due to dispicable behavior but legal and smoking, heretofore, illegal substances other than tobacco are being legalized and its okay to put that in your lungs... smoking is smoking period no matter what's burning... irritation = mucous and cough. I wonder if the cough that develops in non-tobacco users who still are smoking something will be called a "smoker's cough."