The article cited by the former Chief Spirit should be read. It makes a ton of assumptions, including:
1. Transmission occurs primarily in the same row, and only people sitting in front or behind.
2. Everyone wears a mask
3. Those masks are as effective as a retracted Lancet study says there are
4. People who fly are half as likely to have COVID-19 (because they're rich, ignoring the fact that the rich have a lower infection rate because they don't have to be in contact with other people by doing things like traveling)
5. Although exposure over time is a critical factor in transmission, the authors couldn't quantify it, and so ignored it
6. Boarding, deplaning, lavatory transmission is deemed insignificant.
7. The only negative outcome considered is death, while long-term illness and disability is not mentioned.
and so on.
The fact of the matter is that this is a best-case scenario, and, read in that light, it's hardly encouraging.