Technical Report: Highly Pathogenic Avian Influenza A(H5N1) Viruses

Published on June 5, 2024

This report provides an update to the April 26, 2024, report to include three additional sporadic human cases (1 in Australia and 2 in the United States) and recent activity in wild birds, poultry, and other animals, including the multi-state outbreak in U.S. dairy cattle, and updated information on monitoring for human infections with highly pathogenic avian influenza A(H5N1) virus infections in the United States.

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CDC A(H5N1) Bird Flu Response Update May 31, 2024

May 31, 2024
CDC continues to respond to the public health challenge posed by a multistate outbreak of avian influenza A(H5N1) virus, or "A(H5N1) virus," in dairy cows and other animals in the United States.

Symptom Monitoring Among Persons Exposed to HPAI

June 6, 2024
CDC recommends that all persons exposed to highly pathogenic avian influenza (HPAI) A(H5N1) virus infected birds, cattle, or other animals be monitored for symptoms consistent with HPAI A(H5N1) virus infection starting the first day (day 0) of exposure and continuing until 10 days after the last exposure.