Alliance for Pandemic Preparedness

January 6, 2021

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

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Genomic analysis of viral SARS-CoV-2 isolates obtained during a mandatory quarantine period after a Dubai-to-New Zealand flight demonstrate clear evidence of in-flight transmission. Among 86 passengers on a flight that arrived on September 29, 7 individuals in managed isolation and quarantine (MIQ) had positive test results during the quarantine period. Passengers originated from 5 different countries before a layover in Dubai, and 5 had negative predeparture SARS-CoV-2 test results. All 7 SARS-CoV-2 genomes were genetically identical, except for a single mutation in 1 sample. Multiple instances of in-flight SARS-CoV-2 transmission were determined to be likely despite 4 of 7 of infected passengers reporting mask use. MIQ has been mandatory for citizens and permanent residents returning to New Zealand since March 2020. 

Swadi et al. (Jan 5, 2021). Genomic Evidence of In-Flight Transmission of SARS-CoV-2 Despite Predeparture Testing. Emerging Infectious Diseases. https://doi.org/10.3201/eid2703.204714