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by londons_explore 2291 days ago
There are lots of cases of diseases spreading from one plane passenger to another.

That's part of the reason the airline requires you to sit in allocated seats - so they can notify the people sitting in neighbouring seats if you have a notifiable disease.

My personal hypothesis is the low pressure ultra-low humidity air in planes dries out mucus membranes in the nose and throat making it more likely for airborne things to get in.