Lung cancer among never-smokers is rising worldwide. In one U.S. study of 12,000 lung cancer patients, the share of people who didn’t smoke rose from 8 to 15 percent over twenty years.

Many people can have polyps and, like Andy, have no symptoms. A polyp can take as many as 10 to 15 years to develop into ...

The new lung cancer screening program needs to be independently evaluated to keep it on track, and to minimise the harms.