The decline in HIV infections among adolescent girls and young women in Uganda resulted from a combination of biomedical interventions and broader changes in sexual behavior, according to a modeling study published in PLOS Medicine. Neither factor alone was sufficient to explain the progress.
Adolescent girls and young women remain one of the populations most vulnerable to HIV in sub-Saharan Africa. Understanding what has driven recent declines in new infections is critical for sustaining those gains and informing future public health strategy. The researchers used mathematical modeling to disentangle the relative contributions of medical interventions — such as expanded access to antiretroviral therapy and pre-exposure prophylaxis — from behavioral shifts like changes in partner numbers or condom use.
The findings carry a clear policy implication. Scaling back either biomedical programs or efforts that support protective behaviors could stall or reverse the hard-won progress. The authors concluded that sustaining continued declines in HIV incidence among young women will require maintaining both pillars simultaneously, a message aimed at governments and global health organizations that must decide how to allocate limited resources.
