Such documentation needs to be directly from the healthcare provider that performed the vaccination or the negative Covid-19 test within the previous 72-hours.

(In Ohio, unless the tenant recently moved to the state you can require that the letter be from an Ohio health practitioner)The tenant is required to have a legitimate relationship with the healthcare provider... you don't have to accept any old website certificate: ask the tenant and the provider if the tenant sought out this provider specifically to obtain an esa and if the tenant has been seen by the practitioner before or since.You may ask for vet records showing that the animal is in good health, free of parasites and has all required vaccinations.

Plus, the vaccine is getting rolled out which will curb the spread tremendously.

Your company can also have an ANIMAL POLICY (not pet policy)  that covers things like disposal of animal waste, annual veterinary health forms and proof of vaccinations, periodic inspection of property and immediate repair and charging for animal related damages, etc.  

In addition to a renters insurance policy and vaccination records from their vet, we limit the size of the dog. we also add to our property rules that the dog must always be on a leash, they pick-up the dog poop and the dog must not disturb the other residents if this is a multi-family complex. 

And from there you can require they provide documentation the animal 9a on good health and has its vaccinations so it does not present any health or safety issues to others.

A deposit and monthly fees have to be paid, and the landlord has to see the animal and the vaccination papers.

Meaning, I think people will eventually return to what they were doing to a degree, even if it's a few years after a vaccine, people get more comfortable going back out, etc.I just think there is too much opportunity, research labs, talent, night life, all sorts of things in Boston (and other cities) that will never cease to attract people.But again, to your point, I think this current situation will affect things greatly.

As the vaccines pick up their patience will likely grow shorter. 

Looking for a better 2021.Get your vaccines!