Good catch ElliotWilson and Inanna.
Both AIDS and bird flu are "zoonotic" diseases - meaning they affect humans and animals both.
Also, both spread via bodily fluids - some scientists think that bird flu started with humans, spread to fish via wastewater, to domestic poultry in
feed made from ground up fish - and then to wild birds from domestic flocks...
[edit on 25-3-2006 by soficrow]