This is the first video in a series on viruses, focusing on the coronavirus. Viruses present us with an incredible and sometimes terrifying example of the process of evolution at work. In this series, we look at virus biology, the virus lifecycle, how to kill viruses, and how vaccines and the human immune response works. For more information on the biology of viruses, visit www.evo-ed.org. Support for this work was provided by the National Science Foundation's Division of Undergraduate Education program under Award No. DUE2020221