"Circumcision prevents AIDS. The UN says 'Clinical trials have confirmed the results from observational epidemiology that male circumcision reduces transmission of HIV among men'"
You know what works even better? Consistent condom use and not visiting prostitutes.
I expect Hacker News has a similar consensus. Circumcision is not worse than slavery, but it is one of those relics of human barbarism that will be looked at with scorn and disdain in 50 years. The fact that HIV transmission is marginally reduced by circumcision is a terrible reason to advocate involuntary circumcision of infants.
21% of people living with HIV in the U.S are unaware of their status
I had no clue the number was that big, then after a moment of thought I wondered how they came up with this number... if they don't know how does the researcher?
One possible method: Blood from donors is checked for HIV. If the person ends up having HIV, ask the person if he/she was aware. Then account for the people who normally wouldn't give blood.
I would guess many of them have never heard of it because Pakistan is a country of young people, with mostly inadequate education (I believe the average education level of Pakistani women is between 2nd and 4th grade level, or was the last time I discussed this on the 'Net):
Pakistan today has the youngest population among all those countries that have more than 100 million people. In its case, the median age of the population is only 17 years which means that of the 162 million people in 2008, some 81 million are below the age of seventeen.
