...for why a majority of smokers DON'T develop lung cancer even after a life time of smoking.
Two lung cancer genes identified
Scientists find genetic variations that hike risk of the disease by 60 percent
Reuters - An international research team has identified two genetic variations that appear to increase a person's risk of developing lung cancer by up to 60 percent, they reported on Sunday.
In April the same researchers identified another gene that raised lung cancer risk and they said their latest finding was relevant for both smokers and non-smokers.
"We are looking at differences in the DNA that makes you more or less likely to develop lung cancer," said Paul Brennan, a cancer epidemiologist at the World Health Organisation's International Agency for Research on Cancer.

There are so many other diseases that kill smokers. Sometimes the media focus too much on just lung cancer.