The CDC analyzed samples from the first severe case of bird flu in the U.S. last week, finding mutations not seen in samples from an infected backyard flock. The patient’s sample showed mutations in the hemagglutinin gene. The risk to the general public remains low. The patient had the D1.1 genotype of the virus, different from the B3.13 genotype found in other animals. Rare mutations seen in the patient have been reported in other countries in cases of severe infections. There has been no transmission from the patient in Louisiana to others.
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Bird Flu Virus Shows Mutations in First Severe US Case: CDC
