The COVID-19 pandemic is undergoing a new surge in cases, driven by the increased contagiousness of the Delta variant. As we deal with a third spike in this pandemic, we bring back biologists Ilya Finkelstein and Jason McLellan from the University of Texas to explain what variants are, how they come to be, how we detect them, and more. Ilya and Jason will share what we know about Delta so far, what we can expect, and how we can battle this and future variants. While science and technology play important roles in population health and understanding pandemics, Ilya and Jason will also share what medical and scientific experts believe we can do individually and collectively to improve our outcomes