2024 Yes Investigating dilution ventilation control strategies in a modern U.S. school bus in the context of the COVID-19 pandemic https://doi.org/10.1080/15459624.2022.2050739 Van Dyke, Michael North America Exposure Other Other Carbon Dioxide (CO2) Ventilation rates air change rate COVID-19 infection transmission School bus Tracer gas CO₂ tracer decay method was used to measure air change rates under different ventilation configurations in school buses. Highest ACH achieved with windows and hatches open. Findings guide practical airborne infection mitigation during student transport. 2022