Hospitals care about one thing and that’s good public relations.They refuse to place metal detectors at their entrances because of the inconvenience to the public.
Granted in certain areas it may be a necessity to have metal detectors to detect weapons like at psychiatric units,but otherwise it just isn’t done.
Hospitals are targets for terror attacks but you would never know it with the way they protect themselves.
Got to understand to also that even as a visitor, to see even a metal detector at the front of a hospital, when most of the time, you are visiting someone who is either is ill or injured it would be seen as more stress producing to the visiting person.