Usually the longer you are at the hospital (as a patient or visitor), the greater you risk of secondary infections. If you are just visiting just do like my sister, an RN, did when she was working through her pregnancy:
~bring your own food or, better yet, eat OUTSIDE of the hospital
~change out of your clothes and shower as soon as you get home
~Never stick your hands near your face while at the hospital. You'd be amazed how often you scratch your eye, rub your nose, etc. If you have to, wash up good first.
Angela <><