EPIDEMIOLOGICAL SURVEILLANCE AS A TOOL FOR EFFECTIVE DISEASE CONTROL AND OUTBREAK RESPONSE

Patrick Chimuanya Etus, Micheal Abimbola Oladosu*, Moses Adondua Abah, Okabeonye Sunday Agbo, Bukola Oluwaseyi Olufosoye, Chineye Cynthia Udeh

ABSTRACT

Background: Epidemiological surveillance is the cornerstone of public health, enabling the systematic collection, analysis, and interpretation of health data to guide disease control measures and outbreak responses. The COVID-19 pandemic, the 2022 mpox outbreak, and recurring Ebola and cholera emergencies have underscored critical gaps in global surveillance architecture. Objectives: This review synthesises current evidence on the role of epidemiological surveillance in disease control and outbreak response, evaluates the performance of integrated surveillance frameworks particularly the Integrated Disease Surveillance and Response (IDSR) strategy in Africa, and examines the contribution of digital and genomic innovations to modern surveillance practice. Methods: A narrative review of peer-reviewed literature published between 2020 and 2025 was conducted using PubMed, Web of Science, and Scopus. Search terms included epidemiological surveillance, outbreak response, IDSR, digital surveillance, genomic epidemiology, and disease control. References were screened for relevance, methodological quality, and recency. Results: Diverse surveillance modalities, including passive indicator-based systems, event-based surveillance, syndromic surveillance, and genomic sequencing, collectively contribute to early outbreak detection and response. IDSR implementation across Sub-Saharan Africa achieved ≥80% timeliness and completeness targets in 32 of 47 countries, yet critical gaps persist in laboratory capacity, workforce training, and real-time data sharing. Digital tools, including mobile health (mHealth), geographic information systems (GIS), wastewater-based epidemiology, and artificial intelligence-powered models, have significantly enhanced surveillance sensitivity and predictive capacity. The 2022 mpox and Sudan Ebola outbreaks demonstrated the utility of whole-genome sequencing and contact tracing integration in outbreak containment. Conclusion: Strengthening surveillance systems through sustained investment in laboratory networks, digital infrastructure, workforce development, and cross-border data sharing is essential for effective pandemic preparedness and disease control. Alignment with the International Health Regulations (IHR 2005) and a One Health approach will be critical for future outbreak resilience.

Keywords: epidemiological surveillance; disease control; outbreak response; IDSR; genomic epidemiology; digital health; public health informatics; IHR 2005.