Hiya again Leeby,
I remember your posting last time. You are so supportive it's great for your relative.
I posted a very long reply, but my pc went down ggrr. Never mind, I'll condense it for you he he.
Don't please get too hung up on germs and so on. You'll get phobic yourself, and then that will be dreadful. As slowgoer says, you can be of best help to your relative by visiting her. Talking her short walks and then building them up. Listening to her fears, talking about things together, and having a good laugh and giggle with her will also do her the world of good.
Obviously you can't go to see her if you or your family or friends have colds and so on, but to try and avoid germs altogether can't be done. She will get stronger hopefully and be less prone to infection, so please don't worry about it too much.
I had my surgery 20 months ago, and I am still in recovery so don't worry, it has been such a short time for your relative.
I also have lupus which is an auto immune disease and I have to be very careful of infection, colds in people and all sorts of things, but if I tried to avoid all germs and so on I would not have a life at all. Please don't worry. Just keep anybody who has colds, flu or anything like that away from her and things will be ok.
She is so lucky to have you. I wish you were my relative.
Take care and give her my regards. Don't forget any more questions, come back.