Medical Express As H5N1 bird flu spreads among California dairy herds and southward-migrating birds, health officials announced Friday six more human cases of infection: five in California and one in Oregon — the state’s first. A seventh presumptive California case is awaiting confirmation from the U.S. Centers for Disease Control and Prevention.
All of the reported cases have been described as mild, and each person is believed to have contracted the illness from infected livestock or poultry. In California, the infections occurred among dairy workers. In Oregon, the patient was a poultry worker.