(1/4) Study of #SARSCoV2 transmission on a 5-hour flight from Sydney to Perth. There were 11 people considered infectious on board. Eight probable & 3 possible secondary cases resulted from the flight. 27% sat more than 2 rows away, & 64% had window seats.
wwwnc.cdc.gov/eid/article/26…
wwwnc.cdc.gov/eid/article/26…
(2/4) Two of the secondary cases who sat in window seats never left their seat during the flight. This, and the fact that 27% of secondary cases sat more than 2 rows away from index cases suggests aerosol transmission may have occurred.
(3/4) Index cases didn’t seem equally infectious, and transmission was only detected in the mid cabin. No secondary cases were detected in passengers sitting in the aft cabin, despite infectious passengers being in this area. This raises the possibility of a superspreading event.
(4/4) Almost all index cases had recently arrived in Sydney from cruise ships, and there had been very few #COVID19 cases in Australia at the time of the flight. Probable in-flight transmission was established by sequencing.
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