Hi, In the long run, smoking will add toxins (Tar and Nicotine) that will eventually invite parasites to that area. parasites search out diseased, or damaged toxic filled areas of the body.
Smoking moderately hundreds of years ago probably wasnt such a bad thing-and alleviated stress. Indians smoked it and it probably was good for them.
Thanks to our Greedy tobacco Industries, they added Tar and Nicotine in the cigarrettes to make everyone addicted to buy more. (As Kevin Trudeau says, "I'ts all about the money)
Its the Tar and Nicotene that are killing people and building up in the lungs.
p.s.
I also have intestinal parasites- but none in my lungs-- but I dont smoke and I stay away from 2nd hand smoke.