How many people still die of lung cancer after quitting smoking? By age (by reddit user daysleeperrr) Does Vaping and Smoking Together Increase Lung Cancer Risk? American Cancer Society We know a lot about how ecigs promote cancer metastasis Stanton Glantz blog As early as the 1880s, there was evidence that smoking tobacco damaged your lungs. But it took almost 100 years to definitively show that smoking causes lung cancer. So, what about vapes?