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  1. CDC Reports Potentially Troublesome Mutations in Bird Flu

  2. CDC Reports Concerning Mutation in Bird Flu Found in Louisiana

  3. CDC Confirms First Severe Case of H5N1 Bird Flu in the United …

  4. Genetic Sequences of Highly Pathogenic Avian Influenza

  5. Bird flu update in Louisiana; What the CDC says about mutations …

  6. Bird flu virus likely mutated within a Louisiana patient, CDC says

  7. First severe human case of bird flu in US: 'Concerning' mutation'

  8. America’s first severe case of bird flu confirmed in Louisiana

  9. CDC confirms first severe bird flu case in the U.S. - CBS News

  10. CDC confirms 1st case of severe bird flu in US - ABC News