It is a misstatement that HIV does not fulfill Koch's postulates. A
more accurate statement is that we can't use HIV to fulfill these
postulates. Koch's third postulate states that the purified
microorganism must be inoculated into a susceptible host and cause
disease. Since humans are the only species which develops clinical
disease from HIV, we obviously can't perfrom the needed experiment.
HIV, of course, is not the only microorganism which fails to meet
Koch's postulates for one reason or another.
With that said, however, the evidence for a causal link between HIV
and AIDS is overwhelming. In populations, you never see AIDS without
first seeing the virus in the population. You also never see the
virus in the population without also seeing AIDS. In animal models
using similar viruses (SIV), the postulates have been fulfilled.
While there will always be anomalies in populations, Duesberg is
virtually alone in his interpretations of these anomalies.
Jay MOne'
