Principles of Epidemiology in Public Health Practice: An Introduction to Applied Epidemiology and Biostatistics (34 mins)
Scroll down to "Lesson Five: Public Health Surveillance" and read pages 5-1 to 5-16 to learn more about surveillance in public health.
Click https://web.archive.org/web/20230519060949/https://www.cdc.gov/csels/dsepd/ss1978/SS1978.pdf link to open resource.