Re: Oral Cancer
There is no way to predict who will get cancer from smoking/chewing and who won't. There are just too many factors that come into play...your own personal cellular makeup, your genetic history, luck (bad or good), and who knows what else.
You already know that you're playing with fire, here, so why not stop now? There are other things you can do to get through your study periods...chew gum, suck on hard candies, sip water or other beverages, etc. You've quite once, so you know you can do it...why wait?