WHO guidelines for investigation of human cases of avian
influenza A(H5N1) This revised document replaces the version
published in October 2006 and includes the following changes: -
Revision of section on initiating an investigation - Revision of
the sections on contact tracing, including the time frames for
tracing - Monitoring of health-care workers - Revision and
addition of technical references This document provides a
framework and approach for public health authorities and
investigators at all levels to plan for and conduct
investigations of human cases of A(H5N1) (or other novel
influenza viruses of pandemic potential). The document focuses
on the key steps that should be undertaken in an investigation.