William Morice II, M.D., Ph.D., chair of the Department of Laboratory Medicine and Pathology at Mayo Clinic and president of Mayo Clinic Laboratories, joins the "Answers From the Lab" podcast for his weekly leadership update. In this episode, Dr. Morice and Bobbi Pritt, M.D., explain COVID-19 vaccine boosters: what they are, how they work, and why they may be helpful in fighting the global pandemic.