I happen to be reading the affidavit right now, lol. And yes, the nanny mentions that Anna was hospitalized at some point. The nanny was amazed that a woman named Shirley came to the house and took the baby to see Anna in the hospital.
http://www.aolcdn.com/tmz_documents/021407_affidavit_2.pdf
I believe every word of that affidavit.