Fig. 4
From: Global, regional and national burden of HIV/AIDS among individuals aged 15-79 from 1990 to 2021
Population growth drives increases in HIV/AIDS incidence, while epidemiological improvements alleviate the burden in most regions (1990–2021). Note: The bars illustrate changes in HIV/AIDS incidence attributed to three factors: demographic aging (purple), population growth (green, indicating increases in total population size), and epidemiological changes (yellow, representing shifts in disease transmission patterns, prevention efforts, and treatment access)