Britt Glaunsinger is a molecular virologist whose research investigates how virus–host interactions influence gene expression during infection. She is best known for her work on herpesviruses, revealing how viral proteins manipulate cellular RNA synthesis and fate. Glaunsinger’s lab integrates molecular biology, genomics, and cell biology to study how viruses co-opt host machinery and how cells respond to pathogenic stress. She is Professor of Plant and Microbial Biology and Molecular and Cell Biology at UC Berkeley, and an Investigator of the Howard Hughes Medical Institute. She holds the Class of 1963 Endowed Chair for excellence in undergraduate teaching.