Transmission roles of symptomatic and asymptomatic COVID-19 cases: a modeling study

  1. Jianbin Tan
  2. Yang Ge
  3. Leonardo Martinez
  4. Jimin Sun
  5. Changwei Li
  6. Adrianna Westbrook
  7. Enfu Chen
  8. Jinren Pan
  9. Yang Li
  10. Feng Ling
  11. Zhiping Chen
  12. Hui Huang
  13. Ye Shen
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Abstract

Key Points

Question

What is the transmissibility of COVID-19 asymptomatic and symptomatic cases, respectively? To date, they have not been well quantified in existing literature.

Findings

The transmissibility of asymptomatic and symptomatic COVID-19 increases with patient age. The asymptomatic cases had a 66.72% lower transmissibility rate than symptomatic cases.

Meaning

The transmissibility of asymptomatic COVID-19 cases is not low. Asymptomatic cases are harder to detect compared to symptomatic cases. Consequently, the burden of asymptomatic transmission could potentially dominate the spreading in certain scenarios.

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