About Isabel..

When she was in the hospital being haunted by Marina, we see her getting out of her bed and running through the halls shouting hello! hello!
So later in the security cams we see that, there were people around her while she was screaming.
So, why the hell dint any of the staff care about her? they just left her and dint bother about her shouting, moreover, she was wearing the patients uniform if im right. Well that bothers me. Whats ur take on that?