Evaluating Portable HEPA Purifiers to Reduce Respiratory Viral Exposure in Elementary Schools: Insights from a Randomized Clinical Trial Secondary Analysis

Highlight

  • Portable HEPA purifiers did not significantly reduce high respiratory viral exposure in elementary school classrooms.
  • A modest reduction in the diversity of detectable respiratory viruses was observed with HEPA purifier use.
  • Rhinovirus was the most commonly detected virus in air samples from classrooms.
  • Environmental factors such as relative humidity, grade level, winter season, and particulate matter influence viral exposure risks.

Background

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