If you're wondering what factors Boeing and United smoothed over in their study to get this result, here they are:

-It studied 767s and 777s, not the planes you actually fly on.
-It assumes everyone sits facing forward at all times without talking or turning their heads. https://twitter.com/aldotcom/status/1317158576910204934
-It assumes everyone wears a mask at all times, even though you eat and drink on planes.
-It only accounts for aerosols, not large droplets from sneezing or talking.
-It does study surfaces...but again, only aerosols from masked people, not direct spit droplets.
-It assumes every air vent is fully open at all times.
-It doesn't account for people getting on and off the plane or moving through the cabin.
-It doesn't account for the risk of being at the airport.
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