Very true!
I agree there are pros and cons. I also think there is a much higher risk for a patient to catch flu or ? from a human visitor. Do we ban humans from visiting? Like was done during Covid? Another example of that is allowing a child to visit their mother and newborn infant; done all the time now. Kids are little germ factories. Some illnesses are most contagious before symptoms even appear.
I think it depends on the patient and it depends on the animal. I know of very few diseases that dogs carry that can be transmitted to patients but fleas and other parasites do come to mind. I remember a patient in the OR who we discovered at the end of the surgery had head lice. And
@MarciKS has mentioned more than a few times about bed bug rooms in the ER. These come from people.
I can argue both sides of this. In addition, if I were hospitalized, I would not want my dog to come visit for fear of the dog getting sick. Hospitals are dirty places, even with excellent housekeeping. There was a study done years ago where touch samples from various surfaces in a hospital were cultured. Bathrooms, beds, etc. The culture that grew the most was from the elevator button.