How the current bird flu strain evolved to be so deadly
Miryam Naddaf
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October 18 2023
Researchers studying the evolution of the bird flu virus over the past 18 years have shown how the strain currently circulating worldwide, an extremely deadly form of the H5N1 subtype, has become increasingly infectious to wild birds. The strain emerged in Europe in 2020, and has spread to an unprecedented number of countries.
