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Serial Interval and Intervention Efficiency in Pertussis Outbreak, South Korea, 2024
Emerging Infectious Diseases
|May 12, 2026
Summary
The mean serial interval for pertussis was estimated at 14.7 days. Public health interventions significantly reduced the effective reproduction number, helping to control the school-based outbreak.
Area of Science:
- Epidemiology
- Infectious Disease Dynamics
Background:
- Pertussis (whooping cough) outbreaks pose a public health challenge, particularly in school settings.
- Understanding transmission dynamics, including the serial interval, is crucial for effective control.
Purpose of the Study:
- To estimate the unmitigated serial interval of pertussis during a school outbreak.
- To assess the impact of public health interventions on pertussis transmission.
Main Methods:
- Retrospective analysis of a school-based pertussis outbreak in South Korea.
- Estimation of the mean serial interval using statistical modeling.
- Calculation of the reduction in the effective reproduction number due to interventions.
Main Results:
- The unmitigated mean serial interval was estimated at 14.7 days (95% CI 9.0-27.4).
- Public health interventions reduced the effective reproduction number by 65% (95% CI 26%-88%).
- The interventions likely reduced the effective reproduction number to below 1.
Conclusions:
- The estimated serial interval is consistent with previous findings.
- Public health interventions were effective in curbing the pertussis outbreak by reducing transmission.
- Effective control of pertussis outbreaks relies on timely and impactful interventions.
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