Earlier quoted context omitted.
I won't go near an open office after COVID19 and I doubt I'm alone, I think things will change greatly.
I'm not sure that I understand this sentiment. Is the worry about COVID specifically (and hence would be abated by a vaccine or herd immunity), or is it about increased awareness of all infectious diseases? My lack of understanding stems from a (perhaps naive) assumption that social distancing will eventually go away along with the threat. I'd be glad to hear others' opinions on the matter.
Also keep in mind that there was always a threat of infectious diseases. And it will persist until we find a universal cure for all viruses. Being somewhat of a germophobe myself, I was always aware of it.
Hopefully, people will stay at home when they are sick, though.