An interesting new study performed among bisexual men from New York, Los Angeles, and Philadelphia indicated that circumcision had almost no effect upon the transmission of HIV. Although previous studies performed in Africa and other parts of the world have indicated a very strong protective effect, this study questions these results. So what could be causing these results? One theory the article presents is that the prevalence of HIV in these communities is so high that it offsets any protection conferred by circumcision. That doesn't seem to make sense to me, since the prevalence rates in Africa would be much higher than in the American communities. So I guess we'll have to wait for further research to find out why this study contradicts the others.