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School interventions effectiveness varies with community transmission levels and viral variants. Adapting school policies to the evolving epidemic context is crucial for pandemic preparedness.

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Area of Science:

  • Epidemiology
  • Infectious Disease Modeling
  • Public Health

Background:

  • School-based interventions during epidemics, like COVID-19, face controversy due to balancing transmission reduction with child welfare.
  • The influence of the broader epidemiological context on intervention effectiveness remains unclear.

Purpose of the Study:

  • To investigate how community transmission dynamics and viral evolution affect school-based intervention efficacy.
  • To inform adaptive strategies for school policies in infectious disease control.

Main Methods:

  • Integrated modeling of epidemiological and genetic data from a longitudinal school surveillance study (SARS-CoV-2, 2021-2022).
  • Scenario simulations to assess intervention impact under varying transmission conditions.

Main Results:

  • School transmission dynamics were significantly impacted by rising community infections from successive viral variants.
  • The effectiveness of school-based interventions in reducing infection rates diminished as community transmission increased.
  • Epidemiological context, including pathogen evolution and public behavior, reshaped intervention impact.

Conclusions:

  • A dynamic approach to school-based infectious disease control is essential.
  • Policies must adapt to the evolving epidemiological landscape, considering pathogen characteristics and societal changes.
  • Effective pandemic preparedness requires flexible school intervention strategies.