The Central America Region (CAR) is characterized by a concentrated HIV/AIDS epidemic with low prevalence among the general population, but high prevalence among certain subgroups such as men who have sex with men (MSM); transgender persons; male and female sex workers (SW); clients of sex workers and their partners; certain ethnic groups such as the Gar funa and Kuna; and mobile populations. According to UNAIDS in 2011, HIV prevalence in adults in...