A typical ducted central air system where there is a single system for multiple units has other downsides: 1. landlord pays the electricity for the AC (nothing else is really fair to tenants); 2. single thermostat (unless multi-zoned somehow); 3. air isn’t isolated among the units - the return air goes back to air handler from all units together - so the air from a coronavirus infected person isolating at home potentially spreads to all units.

And in this 2nd scenario, in 2021, if the vaccines prove useless; then hotels & motels will be turned into isolation housing, is one possible plan, with who owns them will likely get paid to house those infected with COVID-19, but who are not yet sick enough to go into hospitals.

Exercise utmost care as one Covid sick person can infect the entire neighborhood and landlord.

As long as the Infected numbers increase, I suspect the economy will stay shut which will be catastrophic to everything we know...

I would cite employment numbers instead of the number of people infected with COVID-19.  99% of this problem is because of perfectly healthy people that were laid off because their employers had to shut their businesses down overnight due to government orders. 

What’s more, tenants and staff will rightly demand to know what steps have been taken to secure their health and well-being now that issues like personal space, infection risk and the importance of good ventilation have been highlighted by the lethal coronavirus.

We don't even know the death rate of COVID-19 because we don't know the number of people infected that show no symptoms.

Until there's a cure we will be in a cycle where single digit groups of infected people can restart a local/regional crisis.

In the more spread out areas, with a much smaller infection rate per capita, and low death count, one can foresee a rather quick return to near full economic activity.

Is it more efficient to mitigate and control infection if there are only 5-6 people within the same residential facility as opposed to 50+ in a commercial facility?