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...
With another man, or men
because they were infected in utero,
By a mother infected by a bisexual man or drug abuser
because they were raped
by a drug abuser or bisexual man
or because they received a tainted blood transfusion (or other substandard medical procedure).
from a gay man or drug abuser.
BTW, do you know the REAL reason all health care workers use universal precautions?
Because it is false. That’s why!