I think a lot of it depends on your personal constitution. I traveled a ton over the last decade, probably over 1,000 flights, and rarely got sick. I think only maybe one or two times that I attributed to travel exposure. Same for my co-workers.
Theoretically, a lot of exposure increases your immune system. So if you are a rare traveler you probably should take more precautions than someone who travels a lot.
I never messed with alcohol wipes and only did normal hand washing, but I did always turn the air vent on full blast in front of my face. Of course business travel during the week usually has fewer sick kids on the plane.
Agree. Fly fairly frequently and don't really do anything special. Feel fortunate to have never gotten much of anything after traveling. Off to Africa again in a few weeks so I probably shouldn't jinx it.