Certainly not with overcrowding anyway - even overcrowding when social distancing measures are being adhered to.
We've all had a ringside seat over the last couple of weeks to observe a linguistic phenomenon; how words and phrases suddenly change their meaning when they jump from one user group to another. There ought to be a proper academic name for this sort of semantic jump - it's quite well-known, especially between languages - but I can't find one. It is also common from a regional or professional user group to the wider language, and oviously the media are often involved in that.
Last month "social distancing" was an obscure bit of jargon among epidemiologists and social scientists involved in planning for pandemics. It's a parameter needed in numerical modelling, to account for differences of behaviour, affecting infection rates, between countries and subgroups of the population. In the model it is changed by "non-pharmacological interventions" of various kinds, to predict how a pandemic can be influenced by us altering our collective behaviour.
This is a typical definition, from a paper* fast-published on 16th March 2020, defining one specific form of social distancing they had modelled, complete with numbers:
Social distancing of entire population | All households reduce contact outside household, school or workplace by 75%. School contact rates unchanged, workplace contact rates reduced by 25%. |
So, nothing there about how many metres apart we are spaced out in trains or car-park crocodiles! That's spatial or physical distancing, or just spacing. Or it was last month. In fact, looking at this forum, the shift has happened since last week.
More seriously, if that label has been redefined in common usage, what do we now call this collection of behavioural changes we've adopted to reduce interpersonal contacts in number and usefulness to viruses?
* "Impact of non-pharmaceutical interventions (NPIs) to reduce COVID-19 mortality and healthcare demand", Neil Ferguson et al for the Imperial College COVID-19 Response Team