According to the CDC, between 12,500 to 25,000 people who are considered "never smokers" (less than 100 cigarettes through their lifetime) die of lung cancer. The causes of which are still unknown.
Since the early 1980s, AIDS research has received around 3 billion dollars annually and as a result AIDS is far from the death sentence it was just 40(ish) years ago. AIDS being a disease that is 100% the result of activity engagement, of you don't frequent the glory hole, you'll never get AIDS.
If you've abstained from smoking cigarettes your while life and are still diagnosed with lung cancer, the best our medical system can offer is a few meger prolonging measures and palliative care, (a hospital bed in your living room and some morphine before you expire.)
But if you have repeatedly engaged in the most depraved, disgusting sexual activities, year upon year, this system works around the clock to provide you with an effective cure in less than one generation.