 The study aims to assess attitudes towards the introduction of immunity passports in six countries during the COVID-19 pandemic. The authors collected 13,678 participants through online representative sampling across Australia, Japan, Taiwan, Germany, Spain, and the United Kingdom. They found that immunity passport support was moderate to low, with the highest support in Germany and the United Kingdom. Baseon generalized linear mixed-effects modeling was used to assess predictive factors for immunity passport support across countries. The results showed that neoliberal worldviews, personal concern, perceived virus severity, fairness of immunity passports, liking immunity passports, and willingness to become infected to gain an immunity passport were all predictive factors of immunity passport support. Gender, immunity passport This article was authored by Paul M. Garrett, Joshua P. White, Simon Dennis, and others.