Originally Posted by
michigan j
https://www.nejm.org/doi/pdf/10.1056/NEJMoa031349
This paper discusses 3 flights where the original SARS (which seems to be less infectious than COVID19) spread on RPT flights. Interestingly, about 1/2 these infections were outside the "2 row zone".
It discusses 3 flights which carried a known SARS carrier, and follows up the other passengers (although only about 40% of them). Of those 3 flights, it was considered to have only spread on one. Even then it is only supposition the others were infected on the aircraft. They were exposed both before and after the flights. The state of infection of the carrier and duration of exposure seem to be the major factors, if it was transmitted on the flights.