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( NewsNation ) — A person in Washington state has been diagnosed with a strain of bird flu not previously seen in humans.

The case is the first human bird flu case in the U.S. since February.

The person, whose name, age, and gender were not released, is described as an older adult with underlying conditions.

They were hospitalized after developing a high fever, respiratory distress and confusion and are continuing to receive treatment.

Officials believe the person was infected with the H5N5 strain of bird flu, which has not been previously seen in humans. Earlier bird flu infections this year were caused by the H5N1 st

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