Bowdoin College

This study found that inflight transmission of COVID-19 occurred between seven passengers, even though 5 tested negative before boarding.  They ultimately concluded that in addition to preflight testing, a pre-arrival quarantine is also necessary in order to prevent transmission during air travel.  

Genomic Evidence of In-Flight Transmission of SARS-CoV-2 Despite Predeparture Testing

Swadi, T., Geoghegan, J. L., Devine, T., McElnay, C., Sherwood, J., Shoemack, P....de Ligt, J. (2021). Genomic Evidence of In-Flight Transmission of SARS-CoV-2 Despite Predeparture Testing. Emerging Infectious Diseases, 27(3), 687-693. https://doi.org/10.3201/eid2703.204714

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