To get more vaccine to more people more efficiently, UCSF School of Medicine's Robert M. Wachter, MD, recently urged giving a single dose now and deferring the second dose until more vaccine is available. Paul A. Offit, MD, of The Children's Hospital of Philadelphia, disagrees. The two discuss the pros and the cons of the plan and alternative responses to road bumps in the US vaccine rollout, on JAMA's live Q&A series. Recorded January 19, 2021. Related Article: Developing a SARS-CoV-2 Vaccine at Warp Speed