Principles of Epidemiology in Public Health Practice: An Introduction to Applied Epidemiology and Biostatistics (97 mins)
Scroll down and read pages 6-1 to 6-39 and 6-51 to 6-58 in "Lesson Six: Investigating an Outbreak." Complete exercise 6.1 on page 6-7 and exercise 6.2 on page 6-13.
Click https://web.archive.org/web/20230519060949/https://www.cdc.gov/csels/dsepd/ss1978/SS1978.pdf link to open resource.