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Assessing virus infection probability in an office setting using stochastic simulation.

R David Contreras1, Amanda M Wilson1, Fernanda Garavito1

  • 1Environment, Exposure Science and Risk Assessment Center, Mel and Enid Zuckerman College of Public Health, The University of Arizona, Tucson, Arizona, USA.

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Office hygiene interventions significantly reduce viral infection risks. Surface disinfection alone offered moderate protection, while combining it with hand hygiene dramatically cut risks from rotavirus, rhinovirus, and influenza A.

Keywords:
Communal workspacesexposure sciencehygiene interventionmicro-activityrisk analysisworkplace wellness

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Area of Science:

  • Occupational Health
  • Infectious Disease Epidemiology
  • Environmental Microbiology

Background:

  • Viral infections pose significant occupational health risks in office environments.
  • Understanding transmission dynamics and quantifying intervention effectiveness is crucial for workplace safety.

Purpose of the Study:

  • To estimate infection risks from rotavirus, rhinovirus, and influenza A virus in offices.
  • To quantify the reduction in infection risk achieved by surface disinfection and hand hygiene interventions.

Main Methods:

  • Simulated human exposure and dose using a validated Monte Carlo model.
  • Incorporated stochastic inputs for human behavior, pathogen transfer, and surface concentrations.
  • Utilized dose-response curves to estimate infection risk and intervention effectiveness.

Main Results:

  • Surface disinfection alone reduced infection risk by 14.5% (rotavirus), 16.1% (rhinovirus), and 32.9% (influenza A).
  • Combined surface disinfection and hand hygiene interventions reduced risks by 58.9% (rotavirus), 60.8% (rhinovirus), and 87.8% (influenza A).
  • Sensitivity analysis highlighted the importance of surface contamination, exposure routes, and human behavior.

Conclusions:

  • Implementing surface disinfection and promoting personal hand hygiene are effective strategies to decrease viral infection risk in communal office settings.
  • Combined interventions offer substantial risk reduction, emphasizing a multi-faceted approach to workplace infection control.