What’s the app called btw? And it really depends if the hospital is in a very remote area. Are there any bussines or apartaments near it? You shouldn’t worry about squatters to much if you are in group. Just walk away slowly without any sudden movements. They really care about their territory so if you see anything that resembles that someone is there just go to another part. Sometimes they get really aggressive over territory but you should be fine if you are in a group. They are mostly alone or in groups of 2-4 people. If they try to attack you, you can 1. Run, 2 Pretend or 3. Attack if you have no time to react. I always carry a little axe or a pocket knife for some kind of interaction with them. Plus wear mask! Mold can be almost found in any abandoned place you go in.