Another function of PetScreening.com is that they track the animal’s vaccination and let the tenant and LL know when a vaccination is due. 

Barking for hours when no one is home would be a nuisance issue, and subject the tenant to possible removal of the animal or tenant vacating...again after a "reasonable" accommodation with regard to timeline for such removal.We also require a current Veterinarian's report on health and vaccination status; animal must be spayed or neutered to reduce aggressive behavior unless Veterinarian recommends against; offensive odors must not emanate from the residence and proper sanitation must be maintained within the unit.

Further complicating things, I don't want to travel until I'm vaccinated, so I doubt I can physically visit any properties until June/July.   

They usually want vaccination records, bite history and other documentation of pets.They are also looking at trampolines, tiki torches, fire pits, BBQ grills under a tree on the outside.They also look at plumbing, electrical and framing. 

The pets will also have to be spayed/neutered, up to date on vaccines at the time of signing the lease, and I will charge a non refundable pet deposit.People who own pits (which are wonderful pets), dobermans, chews, etc. need to live somewhere.

You may have read recently about Carnegie Mellon Universities' research into providing microneedle drug delivery patches for the Covid-19 vaccine.

Further, you can also place "reasonable" restrictions on the animals, including the requirement of a recent veterinarian report on the health and vaccine status, with annual updates; must be spayed or neutered unless contraindicated by veterinarian; must be in a carrier or on a leash (unless this prevents them performing their service or task) in common areas,especially elevators, stairways, and other areas where people would be in confined spaces; must clean up after the animal properly in common areas; offensive odors must not emanate from the residence; aggressive or nuisance behavior (such as extended periods of barking NOT related to the service or task they provide) can be prohibited, and potentially grounds for removing the animal and/or the resident; animal must have a chip or collar with owner's identifying/contact information; must have appropriate city/county license if required locally; and photos of the animal for your records.A thorough and clear policy will deter many of those that are less than sincere from applying when they are made aware of the policy details early in the process...like at the viewing, and mention of the policy in ads.

I am surprised that now the talk is turning to “wait until we have a vaccine”!

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

While there are concerns about more virulent strains of COVID-19 impacting areas with lower vaccination rates, the general consensus is the growth in the U.S. economy is expected to continue this year and likely into 2022.