I would expect it to be readily apparent that the word buzz refers to the affect that nicotine has on the human body and brain. No more, no less. Everyone has a different word to describe it and that's the one that comes to mind.
Regarding health effects, I tend to be suspicious of pneumonia or the buildup of fluid in my lungs due to
vaping. Given that nobody in 20 replies has indicated such, I'm not real worried about it