Over the last few weeks, people have been asking me for my opinions regarding vaccine passports and some have been outraged by the fact that many such systems do not consider infection-acquired immunity and that I as a proponent of science-based policy should voice dissent with this apparently unscientific policy. I’m about to disappoint those people profoundly though- these policies are completely correct to ignore infection-acquired immunity, and I would go as far as saying in all setting...