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Vaccination as a social contract.

Lars Korn1,2, Robert Böhm3,4,5, Nicolas W Meier6

  • 1Media and Communication Science, University of Erfurt, 99089 Erfurt, Germany; lars.korn@uni-erfurt.de.

Proceedings of the National Academy of Sciences of the United States of America
|June 17, 2020
PubMed
Summary
This summary is machine-generated.

Vaccinated individuals act on the social contract by showing less generosity toward unvaccinated others, especially when they perceive vaccination as a moral duty. This highlights cooperation

Keywords:
generosityreciprocityvaccine advocacyvaccine decision makingvaccine hesitancy

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Area of Science:

  • Social psychology
  • Behavioral economics
  • Public health

Background:

  • Vaccination benefits both individuals and society by reducing disease transmission.
  • The concept of a vaccination social contract suggests a moral obligation to vaccinate for collective welfare.
  • Limited understanding exists on whether individuals adhere to this social contract in their behavior.

Purpose of the Study:

  • To investigate if individuals uphold the vaccination social contract.
  • To examine how personal vaccination status and others' vaccination behavior influence generosity.
  • To determine if group membership affects generosity in the context of vaccination.

Main Methods:

  • Four preregistered experiments were conducted with over 2,000 participants.
  • Investigated generosity based on own and others' vaccination status and group affiliation.
  • An internal meta-analysis synthesized findings from the initial experiments.

Main Results:

  • Vaccinated individuals consistently displayed reduced generosity towards unvaccinated individuals.
  • This effect was independent of the other person's group membership, indicating a moral principle.
  • The social contract effect was stronger among those viewing vaccination as a moral obligation.

Conclusions:

  • Individuals adhere to the vaccination social contract, acting cooperatively.
  • Perceived moral obligation intensifies adherence to the social contract.
  • Highlighting the social contract may increase vaccine uptake and disease elimination efforts.