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Public Health Surveillance

Watch the Epidemiology course playlist:    • Epidemiology   How do public health systems detect, monitor, and respond to health threats in populations? This lecture introduces the principles of public health surveillance, a foundational tool in epidemiology used to systematically collect, analyze, and interpret health data for action. You’ll learn the definition and purpose of surveillance and how different systems are designed to track diseases, detect outbreaks, and guide public health decision-making. Through applied examples—including COVID-19 surveillance, virologic surveillance, invasive bacterial disease surveillance, and wastewater surveillance—this lecture compares active and passive surveillance systems and examines the strengths, limitations, and ethical considerations involved in surveillance program design. The session also clarifies the important distinction between public health surveillance and research, reinforced through practice questions. 00:00 Surveillance Intro 00:11 Definition & Purpose of Surveillance 01:50 Practice Question 1 02:05 Active versus Passive Surveillance 03:52 Virologic Surveillance 05:11 Invasive Bacterial Disease Surveillance 11:30 COVID-19 Surveillance 22:21 Wastewater Surveillance and more examples 25:06 Considerations When Developing a Surveillance Program 35:47 Research versus Surveillance 37:27 Practice Questions This video is part of an epidemiology course developed for the University of Alaska and emphasizes examples relevant to population health, infectious disease, and environmental change in the Circumpolar North—while remaining applicable to epidemiology practice anywhere. #Epidemiology #Surveillance #infectiousdiseases #COVID19 #WastewaterSurveillance #OneHealth #PublicHealth #populationhealth