I thought you would prefer something more polar bear oriented, but OK. And to be clear since I think your reading comprehension might be failing you again, they treat the diseases before releasing the animals.
Here is an organization that does that.
https://www.wildlife-rescue.org/
And a youtube channel that does it as well.
https://www.youtube.com/@WacoWildlifeRescue
Now, I haven’t vetted them to see if they are perfect at their jobs, but it is certainly an example of what I suggested.
Also, why would Iceland build a polar bear jail when there hasn’t been another polar bear since 2016?
So they don’t have to shoot the bears obviously.
I did.
My initial comment did not explicitly say they would be treated because I thought that would be obvious. I guess I gave you too much credit. But you still should have figured it out when I mention veterinarians.
Again that’s not something I am qualified to to work out. You would have to ask someone else for that.