@countrymage I disagree about the taking all forms of entertainment part, as we were never shown her using any in the first place, we can't claim neither that she was allowed to watch or wasn't if the manga didn't explicitly show it.
The shrinking her living space is most likely an author's mistake. Isolation rooms don't have curtains as they function under a corridor system (room, corridor, another room, designed that way to prevent the spread of airborne pathogens) and that pathogens can stick to the curtains. The curtain thing is shown in some medical drama, but that is because of artistic license, and perhaps where the author got the idea (or maybe Japan has a different design, meh).
I know about them calling Kanji to make/allow him to call her part, saying Kanji called her(which is true) functions the same as "the staff contacted Kanji to make/allow him to call her" in the sentence it was used, as the point of importance is that she didn't know Kanji's condition.
@WillLi I don't think checking for a disease is all that they did, since they already said that her body is in good health. Now I wouldn't know what would be done in a hypothetical scenario if an otherworld person suddenly appeared in this world and was placed under hospital isolation and observation.