Vaccine passports are already being adopted in some countries. The United States isn’t one of them yet, but the White House is considering the issue. A passport means proof of COVID-19 immunization would be required to enter some venues and, increasingly, airplanes. This week, we explore the many thorny medical, practical, and ethical issues surrounding the question of vaccine passports. Three guests help us understand these complicated issues: Gerald Commissiong, the CEO of Todos Medical; Dr. Sarah Chan, Chancellor’s Fellow in Ethics and Science Communicator at the University of Edinburgh; and Jeff Price, a top expert in aviation security and airport management. Our next story looks at how things are going three months since hospitals were supposed to start posting their prices online to help consumers shop around and not be shocked when the bill comes. According to our guests, things aren’t going exactly as planned. We’re joined by David …