"Isolation room"

An elderly relative who is in hospital long term had been moved into a single room. When we next visited we only stopped at the nurses station as the door was closed and we recognised the nurse, so asked if it was ok to go straight in. She said yes and even opened the door for us; very friendly and helpful as always. However it wasn't until we came back out to get a chair that we noticed an Isolation notice on the door. I went straight to the nurses station and asked about it, the reply was oh yes you're supposed to wear an apron and gloves. I did ask the nurse for a brief update on how my relative was getting on and whether the isolation was to stop her catching something or ....... (for us catching something) and she quickly answered both. I didn't get a chance to go into it any further at that moment. Surely then we should have been asked if we had any colds/infections or if we had an immune deficiency or I was pregnant?! God forbid if the get an Ebola case