California health officials issued a warning after a second batch of raw milk from Raw Farms tested positive for H5N1, prompting a recall and new health alerts. In addition, two dairy workers in California have tested positive for the virus, raising the state's total human cases to 31 for 2024. The national total of human cases is now at 55.1
The California Department of Public Health (CDPH) originally issued the alert on November 27, following the detection of the virus in milk produced by Raw Farms, based in Fresno County. While no human illnesses have been linked to the contaminated milk, investigations are ongoing, and health authorities are tracking affected products at retail outlets.2
The affected batch of raw milk was discovered through testing at the Santa Clara Public Health Laboratory, leading to a voluntary recall of products by Raw Farms. Health authorities are also monitoring other affected retail locations, including Sprouts Farmers Market stores. Authorities are also tracking retail outlets that sold the contaminated milk, with 49 locations identified, including Sprouts Farmers Market stores. Consumers who have purchased the recalled milk are urged to return it to the retailer.1
The H5N1 virus has spread to additional dairy herds and poultry farms in the US Since November 27, California has reported 14 new outbreaks, raising the state’s total to 475, with 689 affected dairy herds across 15 states. Poultry farms in California, Minnesota, North Dakota, South Dakota, Utah, and Tennessee have also been impacted.1
Symptoms of bird flu in humans can include fever, cough, sore throat, diarrhea, muscle aches, fatigue, difficulty breathing, and pneumonia, with severe cases potentially leading to death. The virus spreads primarily through contact with infected animals or their bodily fluids, including feces, feathers, and saliva. People can become infected by inhaling contaminated dust or droplets, touching contaminated surfaces, or consuming raw (unpasteurized) milk from infected cows.3