But beyond the logistics, immunity cards themselves also raise some serious ethical and legal questions, given that they are based on the concept of dividing society into two classes of people: those who have COVID-19 immunity, and those who don’t. “My instinct is that this doesn’t seem like a very good idea for a variety of different reasons,” Dr. Daniel Goldberg, an attorney and associate professor at the Center for Bioethics and Humanities at the University of Colorado Anschutz Medical Campus tells Rolling Stone.