AIDS does not behave like an infectious disease...
...essentially nonexistent in teenagers
... essentially nonexistent in female prostitutes not using drugs
... essentially nonexistent in wives of male hemophiliacs
... cannot be produced in laboratory animals
... predominantly affects males in USA and Europe... no other infectious disease discriminates based on gender.
... requires 10 to 20 years after "exposure" to produce disease.

All of the above indicators point to a lifestyle disease, NOT an infectious disease.