In February 2007, Aurora was diagnosed with Severe Aplastic Anemia. It is a very rare (strikes approx. 2 in 1,000,000 people) and life threatening condition that leaves her bone marrow unable to re-produce new stem-cells and, therefore, unable to produce enough red blood cells, white blood cells, and platelets. Aurora's case is idiopathic, but one of their "theories" is that her immune system could be attacking her bone marrow.
There have been blood tests, transfusions and even a couple of bone marrow biopsies (not to fear, they put her to sleep!). But thankfully, Aplastic Anemia has cure rate of approx. 80 - 90%, and with Aurora's young age and (otherwise) good health her chances are really good.