actually no one dies of aids. most dthat have aids actually die of pnuemonia. aids kills the immune system then some other disease actually kills you. now that 5th grade health is over. yes jenny died aan aids related death. she even tells forest that she has some terminal virus that they dont know what to do with.
I believe it says in the movie i think (I can't quite remember which is sad cause I've seen it at least 50 times). But if sh die of aids she probably contracted it during her heroine shooting hippy days from the needles and gang bangs. But yea, I'm gonna put my money on AIDs.