About 10-12 years ago, I found an MS thesis online from an epidemiologist, who created models using estimates of ratios of HIV transmission/ # of risky events (sex, needle sharing, etc.) to argue that the epidemic could only have been caused by contaminated injections---not risky sex, as the public health folklore has it. It was quite a convincing argument and of course, the epi-centers of the early epidemic occurred near the Hep B trial sites. We only have the CDC's word that the Hep B serum was not tainted. . . . I've searched for that document since, but haven't been able to find it.
About 10-12 years ago, I found an MS thesis online from an epidemiologist, who created models using estimates of ratios of HIV transmission/ # of risky events (sex, needle sharing, etc.) to argue that the epidemic could only have been caused by contaminated injections---not risky sex, as the public health folklore has it. It was quite a convincing argument and of course, the epi-centers of the early epidemic occurred near the Hep B trial sites. We only have the CDC's word that the Hep B serum was not tainted. . . . I've searched for that document since, but haven't been able to find it.