Avian Influenza — United States
A new CDC study describes findings from a series of CDC laboratory experiments designed to improve understanding of the human health risk posed by 2 H5 bird flu viruses detected in birds in the United States: H5N2 and H5N8. Findings of this study indicate that the H5N2 and H5N8 bird flu viruses detected in the United States were less lethal in mammals and replicated (made copies of themselves during infection) at a lower level than the H5 bird flu viruses from Asia that have caused infections,
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