HIV in the Philippines, 1984–2025: A Longitudinal Analysis of National Surveillance Data and Youth Vulnerability Patterns

Background: The Philippines is experiencing one of the fastest-growing HIV epidemics globally, with a substantial rise in cases over the past two decades, particularly among young populations. Understanding long-term epidemiological trends and youth vulnerability is critical for informing effective public health interventions. Methods: This study utilized a longitudinal descriptive-analytic design based on secondary data from national HIV surveillance systems and international health reports. Data covering the period from 1984 to 2025 were systematically collected from sources including the Philippine Department of Health, UNAIDS, and WHO. A structured selection process guided by PRISMA principles was employed, and the study protocol was registered in PROSPERO (Registration No.: CRD420261356238). Key variables analyzed included annual HIV case counts, demographic distribution (age and sex), geographic patterns, and modes of transmission, with a specific focus on individuals aged 15–24 years. Results: Findings indicate a marked increase in HIV cases, particularly after 2010, with cumulative cases exceeding 160,000 by 2025. The epidemic is highly concentrated among males, accounting for over 90% of cases. Notably, young individuals aged 15–24 years represent nearly half of newly reported infections, highlighting a disproportionate burden in this age group. Transmission patterns have shifted toward predominantly male-to-male sexual contact, while urban regions such as Metro Manila and Central Visayas remain major hotspots. Persistent gaps were identified in testing, treatment, and viral suppression, alongside behavioral and structural drivers including stigma and limited access to prevention services. Conclusion: The HIV epidemic in the Philippines is rapidly expanding, with young populations at the center of transmission dynamics. Strengthening youth-focused prevention strategies, expanding access to testing and treatment, and addressing structural barriers such as stigma and healthcare inequities are critical to curbing the epidemic and improving long-term public health outcomes.