Bird flu traces found in California Bay area waste water.

Signs of avian flu found in San Francisco wastewater Signs of H5N1 bird flu virus have been detected at three wastewater sites in California's Bay Area, according to sampling data. Medical Xpress

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While positive wastewater samples have been found in seven other states, California is the only one that has yet to report a bird flu outbreak in a herd of dairy cows.

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