There were also dogs who could smell Covid, and a big name (MIT?) was going to release an app that could hear your cough and detect if it was Covid... I wonder

There were also dogs who could smell Covid, and a big name (MIT?) was going to release an app that could hear your cough and detect if it was Covid... I wonder about those too. Having a pet dog that can smell it would be awesome, or maybe worrisome, because you might end up dodging people left and right on your dog walks.