In this video, Dr. Margaret Liu, a leader in the science of vaccines and a global health expert, explains how her early research on vaccine development became critical to the COVID-19 pandemic, and how she is currently working with the World Health Organization to establish guidance on vaccines to enable their global usage. Liu also reveals the advantages of T cell vaccines, explores some of the key learnings from the on-going pandemic, and highlights the critical role of education in overcoming future health crises. Dr. Liu was a keynote speaker at this year's AACC Annual Meeting with a talk titled: COVID-19: Vaccines and the tango of viral evolution and host immune responses.