On the topic of stickers, the hospital I visit frequently visit uses stickers to show employees that visitors have gone through the temperature check & symptom questioning at the entrance. These stickers are incredibly generic, and I doubt that staff even look at the stickers. Most likely, they assume that visitors have done the temp check because its at the entrance, and it would be basically impossible for someone to sneak by unnoticed.
I visit the hospital frequently because it has a gym. In my mind, a few of the COVID policies enforced by the hospital are a bit overkill (in the gym, at least). As for the rest of the hospital, it only makes since to keep security tight when SW Missouri is possibly the worst area in the country when it comes to COVID, with a 40% vaccination rate. Specifically, the gym does not allow spotting a fellow lifter because that would not be proper physical distancing. If you ask me, getting crushed by at LEAST 50 pounds of metal may do more damage than COVID in most people.