The HIV/AIDS landscape in Bangladesh: an updated review of epidemiological trends, prevention gaps, and key population engagement.

HIV/AIDS in Bangladesh has historically remained below 0.01% prevalence in the general population; however, recent provisional epidemiological data indicate a concerning shift, with the highest annual increase recorded between November 2024 and October 2025 (1891 new cases; 254 AIDS-related deaths), signaling evolving transmission dynamics. Despite an overall low national prevalence, the epidemic remains highly concentrated among key populations, including people who inject drugs (PWID), men who have sex with men (MSM), female sex workers (FSW), transgender individuals, and migrant workers, where prevention and service coverage gaps have been documented. This narrative review synthesizes evidence published between 2015 and 2025 on HIV epidemiology, prevention strategies, testing infrastructure, treatment outcomes, and structural barriers in Bangladesh. Data were drawn from peer-reviewed studies identified through systematic searches of PubMed/MEDLINE, Google Scholar, and Bangladesh-specific repositories, supplemented by national surveillance reports (National AIDS/STD Programme; Integrated Biological and Behavioral Surveys), international agency documents (UNAIDS, WHO, Global Fund), and recent programmatic reports. Both peer-reviewed and grey literature sources were included to capture the full range of available evidence. Findings reveal significant deficiencies across the HIV response cascade. Geographic availability of testing services is limited to 23 of 64 districts, and prevention coverage is suboptimal, reaching just 26% of MSM and male sex workers. Progress along the treatment cascade shows 82% of people living with HIV diagnosed (approximately 14,334 of an estimated 17,480), 74% of those diagnosed receiving antiretroviral therapy, and 91% of those on ART achieving viral suppression, all falling short of global 95-95-95 targets. Behavioral indicators highlight ongoing vulnerabilities; only 14.4% of MSM report condom use with commercial partners in the past 6 months and 27% of female sex workers reporting no condom use at last sexual encounter. Stigma and discrimination continue to undermine the response, with 68% of people living with HIV reporting feelings of shame and 54% reporting guilt related to their diagnosis, adversely affecting testing, disclosure, and care engagement. Despite these challenges, harm reduction programs and a pilot pre-exposure prophylaxis (PrEP) initiative demonstrate substantial promise. Strengthening targeted prevention, expanding testing and treatment access, and addressing stigma, funding constraints, and structural barriers are essential to sustaining Bangladesh's low-prevalence status and advancing toward the goal of ending AIDS as a public health threat by 2030.