Journal
HEALTH ECONOMICS
Volume 28, Issue 11, Pages 1377-1382Publisher
WILEY
DOI: 10.1002/hec.3937
Keywords
child immunization rates; fake news; Internet; social media; vaccine hesitancy
Funding
- MOVE-IN Louvain Incoming post-doc Fellowship Programme
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The spread of fake news and misinformation on social media is blamed as a primary cause of vaccine hesitancy, which is one of the major threats to global health, according to the World Health Organization. This paper studies the effect of the diffusion of misinformation on immunization rates in Italy by exploiting a quasi-experiment that occurred in 2012, when the Court of Rimini officially recognized a causal link between the measles-mumps-rubella vaccine and autism and awarded injury compensation. To this end, we exploit the virality of misinformation following the 2012 Italian court's ruling, along with the intensity of exposure to nontraditional media driven by regional infrastructural differences in Internet broadband coverage. Using a Difference-in-Differences regression on regional panel data, we show that the spread of this news resulted in a decrease in child immunization rates for all types of vaccines.
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