[Their] vulnerability to COVID-19 is the only thing that unvaccinated people universally share. They are disparate in almost every way that matters, including why they haven’t yet been vaccinated and what it might take to persuade them. “‘The unvaccinated’ are not a monolith of defectors,” … Boyd: A lot of vaccine information isn’t common knowledge. Not everyone has access to Google. This illustrates preexisting fault lines in our health-care system, where resources—including credible information—don’t get to everyone.