The probe detected the biomarker for H5N1 at three treatment plants, with two confirming that animal protein had already left processing facilities such as dairy farms.
Dairy workers in California continue to face a daunting threat from a virus surge in the state’s dairy cows, as federal officials confirmed 15 more outbreaks today.
The outbreak is Michigan's first since early September. Meanwhile, the USDA confirmed three earlier H5N1 detections in Florida dolphins.
In other avian flu developments, Utah reported an outbreak in commercial poultry in the northern part of the state.
Patients in the confirmed and probable cases had contact with sick cows at nine different farms.
At least two doses of the novel oral polio vaccine type 2 are needed to interrupt transmission
California also reported a seventh potential case, as the CDC shared updates, including the latest genetic sequencing results.
The two patients experienced eye symptoms and have no known connections to the state's three earlier confirmed cases.
Like two recent California cases, the patient had conjunctivitis after working with sick cows.
Along with updates on recent human infections, federal officials detailed new awards for H5 vaccines, which will double the doses slated for the national stockpile.
