Requiring vaccine passports for certain activities:discrimination or behavioural change?

Vaccine passports, or digital certificates of vaccination, can be required in any activity where admission rights are a business choice. But they can be used more widely in society. Vaccination cards are already typically required for children who are sent to childcare, school, and summer camps. Joan Costa-Font looks at vaccine passports’ potential for discrimination, their ability to change behaviour, and the implications of limiting the right to undertake certain activities only to people who have been vaccinated.