Issue Briefs Highly Pathogenic Avian Influenza Subject: Agriculture Public Health Published: January 12, 2026 Agency: Highly Pathogenic Avian Influenza Highly Pathogenic Avian Influenza (HPAI), also commonly known as bird flu, is present in Colorado and nationwide. Recently, it has caused outbreaks in poultry and dairy herds, resulting in the largest animal disease outbreak in the state’s history. View Document