Randall G. Holcombe
There’s only one reason to require COVID vaccine passports: to coerce people into getting the vaccine. While vaccination is not required, a passport requirement would say, “Whether you get the vaccine is up to you, but if you want to travel or shop or do anything outside your home, a passport is required.”
For those who are concerned about getting the virus from unvaccinated people, get vaccinated! Unvaccinated people pose a very small threat to those who have been vaccinated. Sure, the threat’s not zero, but any time you are around other people, you could catch a cold, or the flu, or Ebola, from them. You could get hit by their cars or knocked down if they bumped into you on the sidewalk. The risk to the vaccinated from being around the unvaccinated is small compared to other risks of being in places where other people are present.