(Bloomberg) -- A Michigan farmworker who tested positive for bird flu is just the second person to have been infected since an outbreak in US cattle appeared in March. Surveillance of sewage suggests the virus may be more widespread among dairy cows than reported, raising workers’ risk.Most Read from BloombergNvidia Stock Surges as Sales Forecast Delivers on AI HopesHarvard Students Walk Out of Commencement Protesting SuspensionsStocks Join Bonds in Falling as Fed-Cut Bets Wane: Markets WrapSpac

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