I also see the most risk in terminal areas. Lines for security and customs/immigration are the things that increase my heart rate right now. My other concern is people who refuse to wear a mask. In my part of the world, very few people are wearing masks. I'm not sure what (if any) enforcement power the airlines have on this. They can deny boarding if you aren't wearing a mask, but I don't think they can do much if someone refuses to wear a mask in the gate area or once the wheels come up. Right now, we aren't scheduled to fly again until December. By then, we should be able to figure out exactly how to protect ourselves and our fellow passengers.