Original sentence: A Cochrane meta-analysis of studies done on sexually active men in Africa suggests that circumcision reduces the infection rate of HIV among heterosexual men by 38%-66% over a period of 24 months, and studies have concluded it is cost effective in sub-Saharan Africa
Edited sentence: A Cochrane meta-analysis of studies done on sexually active men in Africa found that circumcision reduces the infection rate of HIV among heterosexual men by 38%-66% over a period of 24 months, and studies have concluded it is cost effective in sub-Saharan Africa