Not so with AIDS. Even if it is contracted by a couple of other means other than homosexual sexual behavior, the source of it was still the same, in all cases.
“That is so false, it boggles the mind that you actually believe it! There are 100s of causes of Lung Cancer. NOT simply smoking. It is one yes, but to claim Lung cancer is totally preventable is ridiculous! You can’t possibly be that ignorant on the subject. Maybe you should do a little actual research, instead of reading junk science articles on the subject.”
Over 90% of lung cancer cases are caused by smoking. Many of the rest are caused by other preventable issues (radon inhalation and asbestos being prominent). The vast majority of lung cancer cases are preventable -- a relatively small number aren't. Similarly, a lot of people who have HIV have it because their husband cheated on them, because they were infected in utero, because they were raped or because they received a tainted blood transfusion (or other substandard medical procedure).
Not sure why that boggles your mind...