Viruses regularly evolve new ways of making people sick, but scientists usually do not become aware of these new strategies until years or centuries after they have evolved. In a new study published today in the journal Science, however, a team of scientists at Michigan State University describes how viruses evolved a new way of infecting cells in little more than two weeks.
The report is being published in the midst of a controversy over a deadly bird flu virus that researchers manipulated to spread from mammal to mammal. Some critics have questioned whether such a change could have
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