Coronavirus mutation has taken over the world. Scientists are trying to understand why.

When the first coronavirus cases in Chicago appeared in January, they bore the same genetic signatures as a germ that emerged in China weeks before. But as Egon Ozer, an infectious-disease specialist at the Northwestern University Feinberg School of Medicine, examined the genetic structure of virus samples from local patients, he noticed something different. A change in … Continue reading Coronavirus mutation has taken over the world. Scientists are trying to understand why.