It’s a common misconception that someone who gets lung cancer must be a smoker or a former smoker.
Cancer Research UK (CRUK) says nearly three-quarters (72%) of lung cancer cases in the UK are caused by smoking, 71% by active smoking, and 1% by second-hand smoke, and the NHS says if you smoke more than 25 cigarettes a day, you are 25 times more likely to get lung cancer than a non-smoker. However, it still means 28% of cases are in people who don’t smoke.
