This came up with our family a few years ago when my inlaws wanted to go see a relative's new home and the wife had MRSA pneumonia. My FIL has horrible sinus issues and my concern was that he'd get it and possibly pass it on to DS. We asked DS' doctor, who also specializes in infectious disease who said they should think long and hard as to whether this was an important enough trip to risk it. Compared it to russian roulette. The inlaws opted not to go -- it wasn't a close relative.
There've been a few conversations about this on this board. A sibling who had MRSA and how she and her parents dealt with it, so a sibling wouldn't get it. And I believe ladybug had concerns when her grandmother had it and her parents were caring for the elderly woman.
So I guess I'd be pretty cautious. MRSA is difficult to get rid of. In our case, the local country doctor told the relative that she was fine, she wasn't contagious, which is why we asked an ID specialist.