I don't know how he got it (g/s), nor do I care. He always seemed a decent guy to me, but what do I know?
As I recall, HIV/aids is not really a disease/virus- nothing has truly been isolated... There are a certain number of factors that one is tested for, have enough and you've got it...
As I recall also, it's usually another illness that gets you - pneumonia is most common, iirc. Magic surely can not only get all his meds, he can also afford to totally isolate himself from any/all parts of the outside world, severely limiting himself from situations where illnesses may be present.
I'd guess that this is how he remains ok vs average joe in NYC that is used as an example.. His level of fitness surely also helped.
I'm sure there are plenty of stories to the contrary, but you have to explain it somehow...
Please just keep this thread civil.