Quote:Male circumcision provides a degree of protection against acquiring HIV infection, equivalent to what a vaccine of high efficacy would have achieved. Male circumcision may provide an important way of reducing the spread of HIV infection in sub-Saharan Africa. (Preliminary and partial results were presented at the International AIDS Society 2005 Conference, on 26 July 2005, in Rio de Janeiro, Brazil.).
http://www.plosmedicine.org/article/info...ed.0020298
Mass circumcision to fight Aids: http://news.bbc.co.uk/2/hi/africa/6730261.stm
Aside from the potential benefits and risks (whatever they may be), I've been told that circumcising a Muslim male is primarily aimed to improve his cleanliness.