This was a USA study
WASHINGTON (Reuters) – Circumcision may reduce a man’s risk of infection with the AIDS virus by up to 60 percent if he is an African, but it does not appear to help American men of color, U.S. researchers reported on Monday.
“Overall, we found no association between circumcision status and HIV infection status among black or Latino (men who have sex with men),” said Millett, who presented his findings to the CDC’s National HIV Prevention Conference in Atlanta.
Experts knew circumcision would not protect a female sex partner, nor the male sex partner being penetrated.
But Millett’s study found no benefit of circumcision to any of the men. “We also found no protective benefit of circumcision among those men reporting recent unprotected sex with a male partner in which they were exclusively the insertive male partner,” he said.