The delta variant of COVID-19 continues its forceful spread as a highly contagious virus. And as if that wasn’t enough, scientists are learning more about the mu variant — which is likely to have its origins in South America.

The World Health Organization has labeled it a “variant of interest.”

Dr. Stuart Ray is a professor of medicine in the Division of Infectious Diseases at Johns Hopkins Hospital, and The Show spoke with him to learn about the mu variant.

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