In the year since our experiment was fielded (1), vaccination rates around the world have exhibited marked variation. In their response to our original article, Spreco et al. (2) highlight an important challenge for global public health officials; states with a lower vaccinated population fraction also tend to be more corrupt, as measured by the corruption perception index (CPI) (2). Vaccines are a public good, and hence, governments play a critical role in vaccinating their populations. In contexts with high levels of governmental corruption, citizens will and should be skeptical as to whether they will have appropriate access to this critical public good.
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