Below is a graph showing the risk in men of developing lung cancer based off how many cigarettes they smoke per day.
You can access more information about this chart at this website.
I also have been very interested in the HPV shots. When I received the set of three shots, the vaccine was still experimental; I have been curious to what it does/prevents ever since. I would really like to work on this topic specifically during my cancer project. A link explaining the purpose of this series of shots given to children is here.