Hi Vic,
I am so sorry to hear about Christian,I wish him health and joy,ferritin levels will be effected after stopping desferal,but i don't think that would be a big difference,have you had his WBC count check,i don't know if it has much relavance with desferal but still to be on the safe side,if there is no obvious reason of his sickness,how is he feeling now?i hope he'll be fine soon.
LOVE ALWAYS,
ZAINI.