Two men from northwestern Missouri became ill after tick bites infected them with a previously unknown virus. iStockphoto.com hide caption

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iStockphoto.com

Health Department officials cull birds and put them in sacks after bird flu virus was detected in Bhubaneswar, India. Biswaranjan Rout/AP hide caption

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Biswaranjan Rout/AP

Bird Flu Studies Getting Another Round Of Scrutiny By Panel

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