There must be some songs about Aids. I've never heard any though.

As has been shown already, there are lots of good songs about TB and VD. Not much other than that though. But I've got a feeling there's a Sea Shanty about Yellow Fever.

Of course most times in songs people just fall ill and die, and noone puts a label on it. Unless they say it was abroken heart.

Oh yes, there's a song I wrote which is about flu, at least that's where it started.

They call it the flu, but you don't fly,
just hang around, and wait to die,
it feels like time's just crawling by -
Millennium Flu, it's got to you.
When your body aches, your mouth is dry.
you cry for help, there's no reply,
you pray to live, but you don't know why - Millennium Flu, it's got to you.

For the rest of it - click on The Millennium Flu