Spatial distribution and determinants of childhood vaccination refusal in the United States

Area of Science:

• Public Health
• Epidemiology
• Biostatistics

Background:

• Childhood vaccination rates are declining in the US, increasing risks of vaccine-preventable diseases.
• Parental vaccine refusal and delayed vaccination challenge herd immunity.
• Understanding the drivers of vaccine refusal is crucial for public health interventions.

Purpose of the Study:

• To analyze US county-level childhood vaccine refusal data (2012-2015).
• To identify socio-demographic and political factors associated with vaccine refusal.
• To inform targeted strategies for improving vaccine uptake.

Main Methods:

• Utilized a Bayesian zero-inflated negative binomial regression model.
• Analyzed administrative healthcare data for patients under five years of age.
• Examined national fine-scale socio-demographic characteristics and spatial clustering.

Main Results:

• Identified specific socio-demographic characteristics linked to vaccine refusal nationally.
• Demonstrated that spatial clustering of vaccine refusal can be explained by these factors.
• Highlighted the influence of social and political processes on vaccine refusal.

Conclusions:

• Socio-demographic factors are key drivers of childhood vaccine refusal.
• Spatial patterns of vaccine refusal are linked to identifiable characteristics.
• Findings can guide the development of effective, targeted public health strategies to boost vaccination rates.