Alliance for Pandemic Preparedness

September 1, 2020

Community Outbreak Investigation of SARS-CoV-2 Transmission Among Bus Riders in Eastern China

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  • In a community outbreak involving two buses with indoor air recirculation on a 100-minute roundtrip to attend a worship event in Zhejiang province, passengers in the bus that had the index case had a 34% higher risk of getting COVID-19 compared to the other bus. Dividing seats on the exposed bus into high- and low-risk zones based on proximity from the index case, individuals in high-risk zones had moderately (but nonsignificantly) higher risk for COVID-19 compared with individuals in low-risk zones.

Shen et al. (Sept 1, 2020). Community Outbreak Investigation of SARS-CoV-2 Transmission Among Bus Riders in Eastern China. JAMA Internal Medicine. https://doi.org/10.1001/jamainternmed.2020.5225