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Related Experiment Video

Updated: Aug 20, 2025

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
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Contribution of Testing Strategies and Contact Tracing towards COVID-19 Outbreaks Control: A Mathematical Modeling

Shu-Chen Kuo1, Byron Fan2, Hongye Zhu3

  • 1National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan 35053, Taiwan.

Tropical Medicine and Infectious Disease
|November 24, 2022
PubMed
Summary

Contact tracing alone is insufficient for outbreak control. Universal testing offers minimal additional benefit when combined with rigorous contact tracing and symptomatic screening for COVID-19 containment.

Keywords:
COVID-19SARS-CoV-2contact tracingsymptomatic screeninguniversal testing

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Area of Science:

  • Epidemiology
  • Infectious Disease Modeling

Background:

  • Contact tracing alone is insufficient for controlling novel epidemic outbreaks like SARS-CoV-2.
  • The effectiveness of universal testing alongside other measures remains under-examined.

Purpose of the Study:

  • To evaluate the necessity and impact of universal testing when combined with contact tracing and symptomatic screening.
  • To assess containment strategies for emerging infectious diseases before vaccine availability.

Main Methods:

  • Utilized a stochastic transmission model to simulate COVID-19 spread.
  • Evaluated containment strategies including contact tracing, symptomatic testing, and universal testing.

Main Results:

  • Universal testing identified subclinical cases but yielded minimal reduction in total COVID-19 cases (0.0009% in low prevalence, 0.025% in high prevalence countries).
  • These reductions were observed when rigorous contact tracing and symptomatic screening were concurrently implemented.

Conclusions:

  • Rigorous contact tracing and symptomatic screening are effective in reducing COVID-19 cases.
  • Universal testing provides limited additional benefit for epidemic containment under these conditions.