As the race to develop a safe and effective COVID-19 vaccine quickens, UC Davis Health recently announced plans to enroll 120 participants in a national clinical trial in partnership with Pfizer. In this episode, the deans discuss the differences between the very first "live vaccines" of the late 1700s and the cutting-edge messenger RNA vaccine at the heart of this new trial. Find out why diversity is important among participants and why the flu vaccine is especially important this year.