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Perceived risk and vaccine hesitancy: Quasi‐experimental evidence from Italy

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  • Claudio Deiana
  • Andrea Geraci
  • Gianluca Mazzarella
  • Fabio Sabatini

Abstract

In March 2021, Italian health authorities suspended the Vaxzevria vaccine (VA) for 4 days over reports of very rare blood disorders among recipients. We exploit the quasi‐experimental setting arising from this break to study the drivers of vaccine hesitancy. Before the suspension, the VA vaccination trend followed the same pattern as Pfizer‐Biontech (PB). After the suspension, VA and PB injections started to diverge, with VA daily decreasing by almost 60 doses per 100,000 inhabitants for the following 3 weeks. The resulting vaccination rate was 60 percent lower than the value that would have stemmed from the VA pre‐suspension pattern. We show that the slowdown was weaker and less persistent in regions with higher COVID penetration and steadier and more pronounced in regions displaying greater attention to vaccine side effects as detected through Google searches. The public's interest in vaccine adverse events negatively correlates with COVID cases and deaths across regions.

Suggested Citation

  • Claudio Deiana & Andrea Geraci & Gianluca Mazzarella & Fabio Sabatini, 2022. "Perceived risk and vaccine hesitancy: Quasi‐experimental evidence from Italy," Health Economics, John Wiley & Sons, Ltd., vol. 31(6), pages 1266-1275, June.
  • Handle: RePEc:wly:hlthec:v:31:y:2022:i:6:p:1266-1275
    DOI: 10.1002/hec.4506
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    Cited by:

    1. Stefania Profeti & Federico Toth, 2023. "Climbing the 'ladder of intrusiveness': the Italian government's strategy to push the Covid-19 vaccination coverage further," Policy Sciences, Springer;Society of Policy Sciences, vol. 56(4), pages 709-731, December.
    2. Stefano Castriota & Marco Delmastro & Mirco Tonin, 2023. "National or local infodemic? The demand for news in Italy during COVID-19," International Journal of Health Economics and Management, Springer, vol. 23(4), pages 507-536, December.

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    More about this item

    JEL classification:

    • I12 - Health, Education, and Welfare - - Health - - - Health Behavior
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health
    • L82 - Industrial Organization - - Industry Studies: Services - - - Entertainment; Media
    • L86 - Industrial Organization - - Industry Studies: Services - - - Information and Internet Services; Computer Software

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