hi...my 10 year old daughter has been ill since the end of February. Blood tests showed that she had a low white blood cell count which has caused extreme tiredness. Last week her right arm and leg started feeling heavy. I was sent to my local hospital where she had an MRI scan of her head and spine. Both came back clear. We are now waiting to for a referral to see a consultant at a local childrens hospital. In the meantime she is getting worse. Is this likely to be the result of a virus?