A relative of mine is dying of bone and lung cancer and of course is coughing up blood, vomiting a lot. When he dies, I will be called by his wife, my sister, to go there to console her and help with final things.She will give he his room to sleep in. I am concerned that the room, carpet, walls, and air condtioner are full of maliignant cells which I do not want to breathe in. Is my concern justifiable?