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H5N1 Technical Report

What to know

These technical reports are intended for scientific audiences. Additional information for scientific audiences and the general public is available on CDC’s Information on Bird Flu webpage.

H5N1 Bird Flu Technical Reports

Technical Report: June 2024 Highly Pathogenic Avian Influenza A(H5N1) Viruses
Read the latest H5N1 technical report for information on H5N1 outbreaks globally.
Technical Report: Highly Pathogenic Avian Influenza A(H5N1) Viruses
Report reviews current outbreaks of influenza A(H5N1) viruses in animals and risk for public health.
Technical Report: December 2023 Highly Pathogenic Avian Influenza A(H5N1) Viruses
This report provides an update to the original report posted on March 17, 2023, to include additiona...
Technical Report: October 2023 Highly Pathogenic Avian Influenza A(H5N1) Viruses
This report provides an update to the original report posted on March 17, 2023, to include additiona...
Technical Report: September 2023 Highly Pathogenic Avian Influenza A(H5N1) Viruses
CDC is actively working on the domestic situation with clade 2.3.4.4b HPAI A(H5N1) viruses in wild b...
Technical Report: June 2023 Highly Pathogenic Avian Influenza A(H5N1) Viruses
The latest H5N1 technical report and all previous technical reports are available from the H5N1 tech...
Technical Report: March 2023 Highly Pathogenic Avian Influenza A(H5N1) Viruses
CDC is actively working on the domestic situation with clade 2.3.4.4b HPAI A(H5N1) viruses in wild b...

Addendums

Human Infection with highly pathogenic avian influenza A(H5N1) virus in Chile
On March 29, 2023, Chile reported its first human infection with HPAI A(H5N1) virus.
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Content Source:
National Center for Immunization and Respiratory Diseases (NCIRD)