Kansas
Concern grows as bird flu spreads further in US cows: 32 herds in 8 states
Experts say the US is not sharing as much data on the outbreak as it should.
Enlarge/ Greylag geese sit on a field and rest while a cow passes by in the background.
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Researchers around the world are growing more uneasy with the spread of highly pathogenic avian influenza… [+5150 chars]
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