Reimagining Primary Health Care: A Historical and Contemporary Review of Community-Based Care Models and Innovations

Abstract BACKGROUND Historically, community-based care has served as a foundation of health service delivery in resource-constrained settings. However, shifting demographics, rising chronic diseases burdens, and digital transformations increasingly challenge the sustainability and equity of these models. We reviewed historical as well as contemporary evidence on community-based care and provide a consolidated summary on the effectiveness and limitations of existing models; identify emerging challenges and future directions to ensure that future remains aligned with the goal of universal health coverage. METHOD Wes conducted a scoping review of available literature using the Arksey and O’Malley framework. A comprehensive search was conducted across PubMed, Scopus, Web of Science, Google Scholar, and grey literature from 1975 to 2025 using a combination of search terms related to community-based care models, community health workers, volunteer-based programs, or digital innovations linked to community care. The data were synthesized thematically into categories reflecting historical evolution, key achievements, challenges, and future directions. RESULTS A total of 134 documents were reviewed. Community-based care consistently improved access to essential services, particularly maternal and child health, infectious disease control, and health promotion in underserved populations. Programs led by volunteer and community health worker led programs contributed to health systems strengthening but faced persistent challenges including high attrition, limited funding, and fragmented integration. Case studies from Nepal, Ethiopia, Brazil, and Rwanda highlighted significant reductions in child mortality, improvement in maternal care, and strengthened resilience during pandemics. Emerging challenges included syndemics, demographic transitions, urbanization, and weakening social structures. Digital technologies and artificial intelligence emerged as potential tools to expand access and efficiency, though they also pose risks if deployed inequitably or without adequate regulation. CONCLUSION Community-based care remains essential for bridging gaps in health system and advancing universal health coverage. Its continued effectiveness will depend on evolving into diagonally integrated, technologically enabled, and people centered model that balances innovation with equity, trust, and cultural relevance. Long-term investment in governance, workforce training, digital infrastructure, and active community engagement will be critical to building resilience against future health crises.