Trends in HIV testing and Seroprevalence among key populations at public health centers in South Korea, 2011–2023: a nationwide analysis

Throughout the study period, PHCs performed fewer than 5% of national HIV tests but consistently contributed a disproportionately large share of new diagnoses-28.3% in 2023-particularly among vulnerable groups such as men, foreign nationals, young adults, urban residents, and individuals undergoing voluntary anonymous testing. Strengthening PHC-based services and expanding outreach tailored to these populations will be essential for enhancing early diagnosis and achieving national HIV prevention goals.