Scientists at CDC and around the world use viral genomic surveillance to track the virus that causes COVID-19. This video walks through how scientists perform viral genomic surveillance in the United States and how it shapes our public health response to COVID-19. Learn more about genomic surveillance at https://www.cdc.gov/coronavirus/2019-ncov/variants/genomic-surveillance.html.This video can also be viewed at https://www.cdc.gov/vaccines/videos/low-res/coronavirus/COVID-19-genomic-surveillance.mp4