Board Thread:Questions and Answers/@comment-66.192.74.130-20130528233407/@comment-6697950-20130529070946

Off topic: Was the long title really necessary? -_-

Back to the topic, it really is mentioned later on in the anime that they were taken to hospital and taken care of there. Even more details are available in the LN.

And I do believe that the part about hospitals should really have been mentioned in Kayaba's speech in the first episode.

Edit: I think that the real grand question is how do they handle their waste, so, before anyone asks that question, the hospital beds that they are on are gel beds that break down bodily wastes and prevent infection.