- Bird flu virus likely mutated within Louisiana patient who became severely ill, CDC says PBS NewsHour
- Genetic Sequences of Highly Pathogenic Avian Influenza A(H5N1) Viruses Identified in a Person in Louisiana CDC
- Bird Flu Samples From Very Ill Patient Had ‘Concerning’ Mutations The New York Times
- CDC: H5N1 mutations in severely ill patient could boost spread, but risk remains low University of Minnesota Twin Cities
- Breaking down what caused the first severe bird flu case in U.S. CBS News