No, it's unlikely, unless you've got some demonstrable damage due to the smoking.
Unlikely in a young candidate.
Shunter, without wishing to get into the "holier than thou" or "there's no evidence smoking really kills you" debate, I suspect you're probably getting away with things 'cos of your age.
In my experience,one of five things usually happen to smokers:
Nothing- Aunt Flo smoked all her life, lived till 108 (sometimes but rare-ish)
Some rare 'orrible cancer consumes you in your middle age (rare-ish)
You die of heart disease younger than you should (sometimes)
You live a normal life, blowing 30% more into the peak flow machine, then you suddenly start dropping off the curve quickly in the your mid fifties- Vera Duckworth type illness. (Common)
You get run over by a bus (rare)
Good health
