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

BA.2, one of three main omicron sublineages, is sweeping the world. BlackJack3D/iStock via Getty Images Plus – By Prakash Nagarkatti, Professor of Pathology, Microbiology and Immunology, University of South Carolina And by Mitzi Nagarkatti, Professor of Pathology, Microbiology and Immunology, University of South …