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Prakash Nagarkatti, Professor of Pathology, Microbiology and Immunology, University of South Carolina

What is the new COVID-19 variant BA.2, and will it cause another wave of infections in the US?

United States University of South Carolina

BA.2, one of three main omicron sublineages, is sweeping the world. BlackJack3D/iStock via Getty Images Plus

A new omicron subvariant of the virus that causes COVID-19, BA.2, is quickly becoming the predominant source of infections amid rising cases around the world. Immunologists Prakash Nagarkatti and Mitzi Nagarkatti of the University of South Carolina explain what makes it different from previous variants, whether there will be another surge in the U.S. and how best to protect yourself.

What is BA.2, and how is it related to omicron?

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