Dogs develop antibodies to the virus. Some believe dog to human infection may be possible. As others have noted repeatedly in other threads, that has not been proven and no confirmed cases exist.
Seems that if the dog has the virus, a lot could be learned from studying it in a properly controlled setting. Examples: does the dog’s saliva include viable virus? Other bodily fluids? Why don’t dogs get sick. Etc.
If the dog doesn’t have the virus, then nothing is served by putting it to sleep.
Wait and see if there isn’t a nutball groundswell for a save the dog campaign even though we all have been served up to death’s door. PETA idiots will make this a top story tomorrow.