Signage is posted outside a virus screening checkpoint outside the University of Iowa Hospitals and Clinics in Iowa City on Friday, March 13, 2020. (Rebecca F. Miller/The Gazette) The long-awaited arrival of a COVID-19 vaccine across the country on Monday morning is a major milestone signaling the upcoming end to the ongoing pandemic. The University of Iowa Hospitals and Clinics is hosting a live question and answer segment at 7 p.m. Monday on the newly approved COVID-19 vaccine with Dr. Pat Winokur, an infectious disease specialist and UI College of Medicine executive dean. She is also the principal investigator on the UI portion of the Pfizer and BioNTech vaccine trial.