2021 has brought news of emerging SARS-CoV-2 genetic variants that increase transmissibility. Will they diminish vaccine efficacy and lead us to lose pandemic control? University of Michigan's Adam Lauring, MD, PhD, a molecular virologist who uses evolutionary theory to study viral transmission and pathogenesis, joins JAMA's Q&A series to explain the variants and what they mean for public health. Recorded February 4, 2021. Related Article(s): Genetic Variants of SARS-CoV-2—What Do They Mean?