H5N1 Bird Flu Technical Reports
Due to ongoing global H5N1 bird flu outbreaks in animals and sporadic infections in people, the H5N1 technical reports will be produced as needed moving forward, and not on a regular cadence.
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.
October 5, 2023
NewNewTechnical Report
This report provides an update to the original report posted on March 17, 2023, to include additional sporadic human cases and activity in wild birds, poultry, and other animals.
Read the ReportBird Flu Updates
- Cambodia: Two Fatal Human Influenza A/H5N1 (Bird Flu) Virus Infections Thursday, October 12, 2023
- Technical Report: Highly Pathogenic Avian Influenza A(H5N1) Viruses Thursday, October 5, 2023
- Reports of Avian Influenza (AI) “Bird Flu” Outbreaks Increased Globally from 2013–2022 Thursday, September 7, 2023
Previous Reports
- July 7, 2023: Technical Report: Highly Pathogenic Avian Influenza A(H5N1) Viruses (cdc.gov)
- April 17, 2023 – Addendum: Human Infection with highly pathogenic avian influenza A(H5N1) virus in Chile (cdc.gov)
- March 17, 2023: Technical Report: Highly Pathogenic Avian Influenza A(H5N1) Viruses (cdc.gov)
