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Um, I think medical and public health researchers are ethically obligated to stop studies if they reach conclusions like this. While at one point it was all fun and games to infect racial minorities with diseases in order to study them, these days I think we've evolved to be a bit more moral in our clinical work. I'm not sure why this offends you . . . would you have liked to be one of the uncircumcised men in the study who was told "Well, we found that circumcision greatly reduces the chance of contracting HIV, but we aren't going to let you get one, so just keep going out there and having risky sex, thanks for participating in our study." Come on!