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To increase Covid-19 vaccine uptake and protect vulnerable people, many countries have introduced a Covid-19 passport in 2021, allowing vaccinated individuals to access indoor facilities more freely and travel to foreign countries. However, the passport has had unintended consequences as it discriminates against those who do not want to get vaccinated for medical, religious, or political reasons, or those who do not have access to vaccines. The present study (N = 678) assessed across Brazil, UK, USA, and a group of other countries, the links between political orientation, human values, and moral foundations, and attitudes towards the Covid-19 passport and whether people perceive it as a discriminatory measure. Results showed that left-wingers, typically more inclined to recognize discrimination, favor the passport more and perceive it as less discriminatory than right-wingers. This pattern remains consistent even after controlling for human values and moral foundations, independently predicting attitudes towards the passport. Overall, our findings provide novel insights into a context in which left-wingers support measures that involuntarily discriminate against certain groups. [ABSTRACT FROM AUTHOR]

Conspiracy beliefs have spread during the Covid-19 pandemic. It is important to understand them because of their potential to undermine trust in societal institutions and willingness to get vaccined. In the present research (N = 538), we assessed the links between conspiracy beliefs, trust in institutions (e.g., government, WHO), and attitudes towards the Covid-19 vaccination across the USA, Brazil and the UK. A moderated mediation analysis revealed the crucial role of political leaders in linking conspiracy beliefs with vaccination attitudes. Trust in the president was positively associated with conspiracy beliefs in Brazil because of its conspiracist president at the time (Bolsonaro), which in turn was negatively associated with vaccination attitudes. In contrast, trust in political leaders at the time in the UK (Johnson) and the USA (Biden) was negatively associated with conspiracy beliefs. In conclusion, our findings contribute to understanding the underlying mechanisms that link conspiracy beliefs with trust and vaccination attitudes., (© 2024 The Author(s). International Journal of Psychology published by John Wiley & Sons Ltd on behalf of International Union of Psychological Science.)