Writing in the Bill & Melinda Gates Foundation’s “Impatient Optimists” blog, Sema Sgaier, a program officer with the foundation, discusses a collection of research studies on the role of voluntary medical male circumcision (VMMC) in HIV prevention in sub-Saharan Africa published this week in PLOS ONE and PLOS Medicine. “…By itself, VMMC is not the answer to Africa’s HIV crisis. … Nonetheless, what has been achieved in just a few years is truly amazing, and it confirms that VMMC can play a vital role in changing the trajectory of HIV in Africa…” (5/7).