Effects of Antivaccine Tweets on COVID-19 Vaccinations, Cases, and Deaths

• URL: http://arxiv.org/abs/2406.09142v1
• Date: Thu, 13 Jun 2024 14:11:02 GMT
• Title: Effects of Antivaccine Tweets on COVID-19 Vaccinations, Cases, and Deaths
• Authors: John Bollenbacher, Filippo Menczer, John Bryden,
• Abstract summary: We present a compartmental epidemic model that includes vaccination, vaccine hesitancy, and exposure to antivaccine content. We find that exposure to antivaccine content on Twitter caused 750,000 people to refuse vaccination between February and August 2021 in the US. Our findings should inform social media moderation policy as well as public health interventions.
• Score: 2.190432422548697
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Vaccines were critical in reducing hospitalizations and mortality during the COVID-19 pandemic. Despite their wide availability in the United States, 62% of Americans chose not to be vaccinated during 2021. While online misinformation about COVID-19 is correlated to vaccine hesitancy, little prior work has explored a causal link between real-world exposure to antivaccine content and vaccine uptake. Here we present a compartmental epidemic model that includes vaccination, vaccine hesitancy, and exposure to antivaccine content. We fit the model to observational data to determine that a geographical pattern of exposure to online antivaccine content across US counties is responsible for a pattern of reduced vaccine uptake in the same counties. We find that exposure to antivaccine content on Twitter caused about 750,000 people to refuse vaccination between February and August 2021 in the US, resulting in at least 29,000 additional cases and 430 additional deaths. This work provides a methodology for linking online speech to offline epidemic outcomes. Our findings should inform social media moderation policy as well as public health interventions.

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