Notice how the author just glosses over all those thousands of hemophiliacs who died in the early 80's from untested blood. In those days there were filthy blood donor centers in the bad part of town where druggies could shuffle in off the street and give a pint or two for $15.00.
A rational person might suspect that there was something in the blood poisoning them but the author here is too busy being clever.
If you truly want to undersand, here's a start (link below)...
In conclusion, HIV is not necessary for the development of AIDS in patients with haemophilia. Nonetheless, since:
1. According to the new 1993 CDC AIDS definition, any individual who is HIV seropositive and who has one ("the lowest accurate, but not necessarily the most recent") T4 cell count less than 200 cells/uL, irrespective of the clinical situation even if asymptomatic, has AIDS (CDC, 1992) and,
2. (a) most haemophiliacs test positive for HIV (but AIDS experts accept that in haemophiliacs a positive antibody test does not prove HIV infection); (b) most haemophiliacs have a low numbers of T4 cells (but AIDS experts accept that in haemophiliacs the immune deficiency may be caused by factors other than HIV);
in the future, by definition, virtually all haemophiliacs will die from no other disease but AIDS caused by HIV.
Link:
http://www.duesberg.com/articles/ephemophilia-2.html