If there is a silver lining out of SARS-CoV-2, hopefully it's that we become more careful in general about infectious diseases, and we don't quickly just revert to the previous behavior.
There are so many axis (axes) on which we can improve.
Rethink doors with pull handles and common surfaces in trafficked areas (Union Station in Toronto has these all over the place. Hundreds of thousands of people and you're pulling common surfaces constantly).
People wearing masks when they aren't feeling well or even if just that they're a bit worried, without it being a social wrong. Despite the social pressure on masks, I have noticed a huge uptick in people wearing masks here in Ontario.
People staying home when they're sick. People having appropriate behavior when they are (even with a "cold").
And most contentious, we as a people just don't need to travel nearly as much. Aside from the environmental cost, many Western countries are particularly susceptible to these outbreaks because everyone is travelling everywhere constantly. For that meeting that could as easily have been an email. Etc.