A campaign to encourage circumcision among men in sub-Saharan Africa to help protect them against the AIDS virus was backed by new research on Monday showing that men who have had the operation are unlikely to engage in unprotected sex. Three major trials have previously shown that, for heterosexual men, male circumcision reduces the risk of contracting HIV by as much as 60 percent -- a finding that has prompted the UN's World Health Organization (WHO) to recommend it as a voluntary prevention option, to be used along with the condom. The new study, coinciding with the 20th International AIDS Conference in Melbourne, took a long look at this argument yet found no evidence to support it. University of Illinois at Chicago researchers questioned more than 3,000 men aged 18-35 in Kenya's Nyanza province who had just been briefed about the option of circumcision and advised on safe sex and testing for HIV.
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