What goes into the decision to mandate a vaccine? Today, Dr. Joshua Sharfstein and Stephanie Desmon continue the conversation on COVID-19 vaccine mandates and speak to the senior director of infection prevention at Johns Hopkins, Dr. Lisa Maragakis, who is leading the implementation of the COVID-19 vaccine mandate at Johns Hopkins. Dr. Maragakis explains the history of vaccine mandates, the decision to create such mandates, and how it's going.