Concern after second strain of bird flu detected in cows
A concerning second strain of bird flu, known as D1.1, has been detected in cows in Nevada after milk samples tested positive. It could make the fight to contain the ongoing outbreak more challenging. CBS News' Jericka Duncan explains.
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A concerning second strain of bird flu, known as D1.1, has been detected in cows in Nevada after milk samples tested positive. It could make the fight to contain the ongoing outbreak more challenging. CBS News' Jericka Duncan explains.
