Two-thirds of captive-bred black-footed ferrets have been vaccinated for the novel coronavirus, and not a single one of the endangered mustelids is known so far to have contracted the disease.

While no adverse effects related to the ferret inoculation have been discovered, the researchers still left a third unvaccinated in case any long-term impacts cropped up.

The vaccinated ferrets currently still maintain coronavirus antibodies, but those antibodies are showing signs of decreasing over time and the ferrets will likely require a booster.

Read the full news story by The Wildlife Society: Black-footed ferret COVID-19 vaccination seems to be working