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A Second Dairy Worker Has Contracted Bird Flu, C.D.C. Reports

The new case, in a Michigan farmworker, did not suggest that bird flu was widespread in people, health officials said, adding that the risk to the general public remained low.

ยฉ Jackie Katz Cynthia Goldsmith/CDC, via Associated Press

An electron microscope image of an avian flu virion.

New Mutations Identified in Bird Flu Virus

A genetic analysis sheds light on when the outbreak began, how the virus spread and where it may be going.

ยฉ Eye of Science/Science Source

A color-enhanced transmission electron microscope image of bird flu viruses.
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