Her "diary" is legally a work of historical fiction that was plagiarized from an actual historical fiction writer, but for sake of argument, let's pretend things happened exactly the way they did in the book. Anne Frank was given medical care at multiple different facilities and later died of typhus. Had she not been taken to the camps, she would likely not have received any medical care to begin with. Later, she died of typhus due to lack of proper nutrition thanks to Allied bombing. We know from RECORDED history (as opposed to uncorroborated hearsay from hysterical witnesses) that every effort was made to stop the spread of typhus in the camps during the last two years of the war. Unfortunately, those efforts were not enough.