Health Surveillance
Summary
Health surveillance encompasses the continuous, systematic collection, analysis and interpretation of health-related data for planning, implementation and evaluation of public health practice. It ranges from routine reporting of notifiable diseases in clinical settings to proactive event-based monitoring of media and community reports. Core tasks include early detection of outbreaks, assessment of disease burden, identification of risk factors and evaluation of control measures. Over time, surveillance systems have evolved from passive, paper-based notification of infectious diseases to multifaceted frameworks integrating indicator-based and event-based approaches, sentinel site networks and demographic surveillance in resource-limited settings. International Health Regulations mandate timely sharing of epidemic intelligence, while One Health initiatives have strengthened links between human, animal and environmental surveillance. Advances in laboratory diagnostics, data interoperability and real-time analytics now underpin global early-warning networks and support model-driven forecasts of vector-borne, zoonotic and emerging infectious threats. Despite technical progress, challenges remain in ensuring representativeness, sustaining workforce capacity and maintaining data quality, particularly in low-resource regions. Continued innovation in digital tools, cross-sector collaboration and capacity-building is essential to anticipate and control health threats at local, national and global scales.
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Health Surveillance publication trend
The graph below shows the total number of articles in health surveillance across all publications each year (not limited to Nature Index journals).
Technical terms
Indicator-based surveillance: Routine collection of structured case reports and laboratory confirmations from designated health facilities to monitor predefined diseases.
Event-based surveillance: Rapid gathering and assessment of unstructured reports—media articles, community alerts or online postings—to detect unusual health events.
Sentinel surveillance: Focused monitoring of disease incidence within selected sites or populations to identify trends and inform wider surveillance.
One Health: An integrated approach recognising interdependence of human, animal and environmental health in the detection and control of zoonotic and emerging diseases.
References
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