GB and others, I am quite surprised that people are questioning the validity of the study. It’s two studies, one with 2700 participants and the other with 5000. It’s sponsored by the US National Institutes of Health (NIH). They used large control groups. This is the gold standard in epidemiological studies.
Of course, using a condom is better and washing with soap and water immediately after sex is also better, but why would you debate a well defined and executed study? They’re not saying its the only answer, just one possible answer.
I’m not a fan of adult circumcision, but I do believe in child circumcision if it conforms to your beliefs. There are many people that debate the benefits and the supposed loss of feeling, but there is ample evidence that circumcised individuals catch fewer stds, HIV and infections. Just my thoughts.