Colorado Inmate Tests Positive for Bird Flu, Marking First US Case

Microbiologist Anne Vandenburg-Carroll tests poultry samples collected from a farm located in a control area for the presence of avian influenza, or bird flu, at the Wisconsin Veterinary Diagnostic Laboratory at the University of Wisconsin-Madison, on March 24, 2022. Scott Olson/Getty Images

An inmate at a state correctional facility in Delta County, Colorado, has tested positive for avian flu, also known as H5N1 flu, the Colorado Department of Public Health announced on April 28.

The unnamed man, 40, tested positive for the flu earlier this week following a nasal swab test and the result was confirmed by the Centers for Disease Control and Prevention (CDC) on Thursday.