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  1. CDC Reports Potentially Troublesome Mutations in Bird Flu Found …

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

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

  4. Bird flu virus likely mutated within Louisiana patient who …

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

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

  7. Bird flu news: CDC finds mutations favouring human-to-human …

  8. U.S. reports first severe human case of bird flu - NBC News

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

  10. H5N1 virus in Louisiana bird flu patient shows mutations that …

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