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Vaccinations

Vaccinations

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Use of an Influenza Antigen Microarray to Measure the Breadth of Serum Antibodies Across Virus Subtypes

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Vaccination and Risk Aversion: Evidence From a Flu Vaccination Campaign.

Clémentine Garrouste¹, Arthur Juet², Anne-Laure Samson³

¹LEDa-LEGOS, Université Paris Dauphine, Paris, France.

Health Economics

|September 24, 2025

Summary

This summary is machine-generated.

A French flu vaccination campaign significantly increased vaccination rates among seniors. This effect was strongest for risk-averse individuals who perceived the benefits of vaccination to outweigh the costs.

Keywords:

influenza regression discontinuity design risk aversion vaccination campaign

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Area of Science:

Public Health
Behavioral Economics
Epidemiology

Background:

Vaccination campaigns aim to increase immunization rates, particularly among vulnerable populations.
Understanding the behavioral drivers of vaccination uptake is crucial for public health policy.
Financial incentives and targeted communication can influence health decisions.

Purpose of the Study:

To determine the causal impact of a French flu vaccination campaign on vaccination behavior.
To identify which demographic groups are most responsive to vaccination incentives.
To explore the role of risk aversion in vaccine decision-making.

Main Methods:

Utilized a Fuzzy Regression Discontinuity Design (FRDD) to analyze the campaign's effect.
Compared vaccination rates between eligible individuals (receiving a free voucher) and non-eligible individuals.
Incorporated a theoretical model to explain observed behavioral patterns.

Main Results:

Receiving an invitation letter with a free flu shot voucher significantly increased vaccination likelihood.
The positive effect of the campaign was primarily observed in risk-averse individuals.
Risk-averse individuals prioritized the potential benefits of flu prevention over vaccine costs.

Conclusions:

Targeted vaccination campaigns, especially those offering financial incentives, can effectively boost flu immunization.
Risk aversion is a key factor influencing individual decisions to get vaccinated.
Public health strategies should consider psychological factors to maximize campaign effectiveness.