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A Smartphone Magnetometer-Based Diagnostic Test for Automatic Contact Tracing in Infectious Disease Epidemics.

Seungyeon Jeong1, Seungho Kuk1, Hyogon Kim1

  • 1Department of Computer Science and EngineeringKorea UniversitySeoul02841South Korea.

IEEE Access : Practical Innovations, Open Solutions
|June 30, 2021
PubMed
Summary

Smartphone magnetometers can detect close human contact, modernizing infectious disease contact tracing. This study validates magnetometer use as an accurate diagnostic test for identifying contacts during epidemics.

Keywords:
Mobile sensingdiagnostic testhuman contact tracinginfectious disease epidemicsmartphone magnetometer

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Area of Science:

  • Epidemiology
  • Mobile Sensing Technology

Background:

  • Close human contact is a primary transmission route for infectious diseases.
  • Traditional contact tracing methods are labor-intensive and can be inaccurate.
  • Smartphone sensors offer potential for automated and scalable contact detection.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of smartphone magnetometer readings for detecting close human proximity.
  • To assess the feasibility of using magnetometer data as a proxy for contact events in epidemic scenarios.
  • To determine optimal parameters for magnetometer-based contact detection algorithms.

Main Methods:

  • Analyzing linear correlation of magnetometer readings between co-located smartphones.
  • Evaluating diagnostic performance using sensitivity, specificity, likelihood ratios, and diagnostic odds ratios.
  • Determining appropriate trace segment sizes and correlation cutoff values for contact detection.

Main Results:

  • High linear correlation observed between magnetometers of nearby smartphones.
  • Magnetometer-based detection demonstrates significant discriminative and predictive power for contact events.
  • Specific ranges for trace segment sizes and correlation cutoffs were identified for accurate testing.

Conclusions:

  • Smartphone magnetometer data can serve as an accurate diagnostic test for close human contact.
  • This technology offers a promising tool for modernizing contact tracing in public health.
  • Optimized parameters enhance the reliability of magnetometer-based epidemic surveillance.