The is for all sizes of poultry producers: commercial, backyard, home flock…
For more information on biosecurity practices, visit: USDA APHIS | Defend the Flock – Resource Center
Defend the Flock Winter Bulletin
https://www.aphis.usda.gov/publications/animal_health/dtf-newsletter-winter-22.pdf
All cases in commercial and backyard flocks: USDA APHIS | 2022 Detections of Highly Pathogenic Avian Influenza