Today we're talking about COVID-19 variants. You've probably heard about the new strains of the coronavirus circulating around the U.S. and the world.

We'll explain where the variants come from, why they're a concern and what can be done to stop them from forming. We'll also discuss whether you'll need a booster vaccine every year.

We're talking about all this with Dr. Carlos Malvestutto. He's an infectious disease expert at The Ohio State University Wexner Medical Center. He's leading multiple teams and research studies on COVID-19 treatments.

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Special Edition: Variants & Vaccines