These photos epitomize what I meant of the post-1918 Flu world...Which I believe answer your questions as to how society (if history repeats itself) will conduct itself with regard to any lingering precautionary-distancing in the upcoming years that follow this pandemic:
In other words...They'll probably tend to forget about it.
True, although airplanes (and their potential to convey life and/or end life) are still very much
concrete concepts still plainly identifiable in the 2020 world...which may not aid in subduing any lingering fear of them, whether (ever) rational or not.
A virus, on the other hand, may as well be as
abstract as radiation or carbon monoxide...You can't see it, (effectively) touch it, taste it, smell it, or have any way to detect its presence whatsoever on your own without a specialized device for detection...And most people without such detection devices would/could easily tend to forget the possibility of it being there if no one else around them is acting like the possibility still exists.