There are better and safer ways of protecting from HIV - condoms, abstinence, common sense, etc. This is a debate here in te US too, and there are many articles and books about the negative aspects of this practice (in America). Yes, there is evidence that the cells under the foreskin are slightly more susceptable to virus penetration, BUT this can be prevented completely with good hygeine. Circumcision - of infants or of teens or adult men can lead to many health problems. Even here in the US - where we are supposed to have the best doctors and facilities - circumcisions go wrong. A poorly done circumcision can lead to great pain - the list of possible problems goes on and on. Here it is from an article:
"The loss of the foreskin places one at risk for complications including meatitis (inflammation and ulceration of the urinary meatus), meatal stenosis (constriction of the meatus, resulting in blocked urinary flow and potential infection), preputial stenosis (scarring that constricts the glans), buried penis (entrapment of the penis by scar tissue), painful erections due to the tightened skin, scarring, desensitization that can severely reduce enjoyment of sexual activity, and a circumcised penis may be significantly smaller than it would otherwise have been. These conditions are almost unheard of in non-circumcised males, but affect up to 20% of circumcised males and may require additional surgery."
This article was talking about circumcision in the US - that's 20% of circumcised men in the US who have these severe problems and pain and need more surgery. I know too many men who have scars so bad their penis doesn't get fully erect or is it is too painful to have an erection so they just don't have sex. Given the current state of medicial facilities and the cost of healthcare in Uganda, promoting circumcision to prevent HIV is like cutting the beak off a rooster so it won't crow in the morning and wake everyone up!!
If circumcision is required by your religion, you should do what is best for you. If it is not, you should seriously think about the consequences before taking such a drastic step to prevent a disease that is so easily preventable by other means.