Cambridge Study Explores Why Some Smokers Avoid Lung Cancer

Cambridge University researchers studied about 600 tumours from mice with different genetic makeups.

They found that DNA mutations differed based on the mice's genes, suggesting cancer risk from smoking varies by individual genetics.

The study indicates that the body's response to tobacco, not just the number of cigarettes, determines lung cancer risk.

No genes fully protect against smoking; it still raises risks of COPD, heart disease, stroke, and other cancers.

Quitting smoking allows the lungs to repair themselves and the body's DNA repair system to resume.