Lung Recovery After Smoking Smoking Recovery Times?

Smoking recovery times? - lung recovery after smoking

I am 19 and have smoked 10-15 cigarettes per day for 3 years when I left my lungs immeadiatly never fully recover and will always suffer a high probability of developing lung cancer. i in the fit and healthy and I am a vegetarian, if thats any help. I really want to and can quit smoking, but he said it's too late?