On May 30, the US Centers for Disease Control and Prevention (CDC) announced that a third dairy farm worker had tested positive for bird flu. The case, in Michigan, was the latest development in the ongoing H5N1 avian influenza outbreak that as of May 28 had reached at least 67 dairy cattle herds in 9 states.
In March, a dairy farm worker in Texas became the first known case of the virus likely transmitting from a mammal to a person. On May 22, a case in a second farmworker, in Michigan, was announced. Both of these workers reported conjunctivitis as their only symptom and have since fully recovered. The latest case in Michigan involved eye discomfort with watery discharge but also upper respiratory symptoms, including cough without fever, according to the CDC. The person is recovering.