The strain of that infected a person in has mutated to spread more easily, officials say — amid growing alarm the disease could spread to more people.The said tests on the H5N1 sample showed it had a mutation that was 'known to be associated with viral adaptation to mammalian hosts' - but insisted the mutations were minor and the overall risk to the public was low.This mutation was not detected in cattle or in wild birds, with officials saying it 'may have been acquired in the patient during the development of the [eye infection]'.
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