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A Simple and Efficient Approach to Construct Mutant Vaccinia Virus Vectors
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Published on: October 30, 2016

Finding and removing highly connected individuals using suboptimal vaccines.

Beatriz Vidondo1, Markus Schwehm, Andrea Bühlmann

  • 1Department of Communicable Diseases, Swiss Federal Office of Public Health, Bern, Switzerland. bea@vidondo.es

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Summary

Targeting highly connected individuals in social networks is key to controlling infectious disease outbreaks. Vaccinating these individuals, identified through a small sample survey, significantly reduces outbreak magnitude.

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Area of Science:

  • Epidemiology
  • Network Science
  • Public Health

Background:

  • Social networks exhibit skewed degree distributions, with a few individuals having numerous connections.
  • Highly connected individuals, or "hubs," can disproportionately influence disease transmission during outbreaks.

Purpose of the Study:

  • To propose and evaluate a novel strategy for controlling infectious disease outbreaks by targeting highly connected individuals.
  • To assess the effectiveness of identifying and immunizing network hubs in mitigating epidemic spread.

Main Methods:

  • Utilized a stochastic, individual- and network-based simulation approach.
  • Implemented a strategy involving a small random population sample identifying acquaintances.
  • Offered vaccination to frequently mentioned individuals, combined with case isolation and contact tracing.

Main Results:

  • Vaccinating the most frequently named individuals (hubs) identified from 10% of the population significantly reduced outbreak size.
  • Complete immunization of identified highly connected individuals is crucial for success.
  • Failure to immunize all hubs, without surveillance of unvaccinated individuals, jeopardizes outbreak control.

Conclusions:

  • The proposed strategy effectively targets the core of disease transmission networks by focusing on highly connected individuals.
  • This approach offers valuable insights for enhancing preparedness and containment plans for diseases like smallpox.