Bird flu virus shows mutations in first severe human case in US, agency says

The U.S. Centers for Disease Control and Prevention said on Thursday its analysis of samples from the first severe case of bird flu in the country last week showed mutations not seen in samples from an infected backyard flock on the patient’s property. The CDC said the patient’s sample showed mutations in the hemagglutinin (HA) gene, the part of the virus that plays a key role in it attaching to host cells. The health body said the risk to the public from the outbreak has not changed and remains low. Last week, the United States reported its first severe case

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