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3rd Edition of the CIFOR Guidelines
A comprehensive source of information on foodborne disease investigation and control.

CIFOR Toolkit
Helping you implement the latest CIFOR Guidelines.

CIFOR Learning Modules
Course covering topics in the CIFOR Guidelines.
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Featured Tool

CDC National Hypothesis Generating Questionnaire [Updated 2025]

The Standardized National Hypothesis Generating Questionnaire (NHGQ) is a tool designed for use during the hypothesis generation phase of a multistate foodborne or enteric zoonotic outbreak...

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This project was supported under Cooperative Agreement #U38OT000172 between the National Association of County and City Health Officials (NACCHO) and Centers for Disease Control and Prevention (CDC). Its contents are solely the responsibility of the developers and do not necessarily represent the official views of NACCHO or CDC.