Bird flu pandemic: How likely is a deadly outbreak?
Controversial new research shows that with just a handful of mutations, the deadly bird flu virus could spread in an airborne fashion between mammals. Just five changes in the structure of the H5N1 virus could give it the ability to spread via airborne particles — a change that brings the potential for a pandemic — and two of those changes can already be found in circulating strains of the virus, according to findings published in the journal Science.
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