The Wisconsin Department of Health Services has detected the first presumptive positive human case of H5N1 infection. The human case follows an infected flock of commercial poultry identified in Barron County, Wisconsin, where this person was exposed to the infected flock. The case was identified through testing at the Wisconsin State Lab of Hygiene and is pending confirmation at the CDC. Wisconsin health officials are monitoring farm workers who may have been exposed to the virus and have provided them with information to protect their health. The risk to the general public in Wisconsin remains low. People who work directly with infected birds or animals are at higher risk. The H5N1 virus has continued to circulate in wild and domestic birds in North America since December 2021. The virus is highly contagious and often fatal to domestic poultry. The disease varies in severity depending on the strain and the species infected.
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