There's no doubt that some sort of vaccine passport would make it easier for vaccinated people to travel — showing proof of vaccination is easier than quarantining or getting tested — but it's unknown how the introduction of such a measure could affect unvaccinated people.
In speaking to the likelihood of a vaccination passport for travel, Pastides said, “I think that either you have [a vaccine passport] or you’re not coming in."
Meanwhile, some experts question the fairness of such requirements and worry that it will lead to further inequality. "Basing reentry into society on just when you get the vaccine could just further entrench inequalities that have arisen," Nita Farahany, professor of law and philosophy at Duke University and expert on the intersection of technology, bioscience, and society, recently told MIT Technology Review. "Trust by minority populations in healthcare and health institutions is very low right now."