Human cases of H5N1 bird flu linked to an outbreak in U.S. dairy cattle prompt concern about missed infections among farmworkers. Blood tests reveal evidence of recent infections in some workers, indicating potential spread from cows to humans. While the virus has not shown the ability for person-to-person transmission, efforts are being made to intensify testing and treatment for exposed workers. Recommendations include testing all farmworkers exposed to infected animals, regardless of symptoms, and offering Tamiflu for high-risk exposures. Challenges include farmer resistance, lack of legal authority for testing, and difficulty in accessing prompt treatment. Public health officials aim to identify and isolate cases to prevent further spread and mutation of the virus.
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