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Interesting article on in-flight COVID transmission 
https://twitter.com/Jemma_Geoghegan/status/1346557476607549441
https://twitter.com/Jemma_Geoghegan/status/1346557476607549441
Passengers A and B were likely infected before the flight and passenger G infected after the flight at quarantine facility. Passengers C-F were presumed in-flight transmission, all within 2 rows of source case(s). https://wwwnc.cdc.gov/eid/images/20-4714-F3.jpg
Key facts:
The plane's auxiliary power unit was disabled for 30 minutes during a refuelling stop - this controls ventilation/filtration
When running, planes have better ventilation/filtration than a hospital OR!
The plane's auxiliary power unit was disabled for 30 minutes during a refuelling stop - this controls ventilation/filtrationWhen running, planes have better ventilation/filtration than a hospital OR!
Droplets travel like tiny wet cannonballs and are more plentiful when sneezing and forceful coughingAerosols are tiny particles that stay suspended in the air for seconds to hours, travel on air currents and can be inhaled through the mouth or nose
So if all the spread was within 2 rows, it must mean that droplets were at play, right? Wrong. Not unless Passenger A was doing some serious acrobatics in their seat while directing forceful sneezes in every direction.
The #COVIDisAirborne smoke analogy is far easier to imagine:
The #COVIDisAirborne smoke analogy is far easier to imagine:
Passenger A lights up a COVID cigarette during the flight. The excellent ventilation/filtration keeps the smoke at bay, perhaps the surrounding passengers get a whiff. During refuelling, the APU is disabled and the smoke starts to accumulate. Perhaps Passenger B joins in 
