Safe Water System


•	What is the Safe Water System (SWS)?
•	Why was the SWS developed?
•	Who is the SWS for?
•	Where has the Safe Water System (SWS) been used?
•	How is a SWS started?

•	Handbook for SWS Implementation
•	Publications & Abstracts

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•	Principles of Epi
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CDC Principles of Epidemiology (3030G)

The following documents are in Adobe Acrobat format. (If you do not have Adobe Acrobat installed click here for instructions on how to install it.)

Lesson	Title
One	Introduction to Epidemiology (PDF 189KB)
Two	Frequency Measures Used in Epidemiology (PDF 156KB)
Three	Measures of Central Location and Dispersion (PDF 134KB)
Four	Organizing Epidemiologic Data (PDF 149KB)
Five	Public Health Surveillance (PDF 157KB)
Six	Investigating an Outbreak (PDF 183KB)
Appendix	Glossary (PDF 53KB)

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Centers for Disease Control and Prevention
National Center for Infectious Diseases
Division of Bacterial and Mycotic Diseases
Foodborne and Diarrheal Diseases Branch