Isla is having a hard time building her Heme levels up. She had a couple of lapses of HUS in December but even before then she has ot been able to keep her Heme levels normal. Hers seem to go up and down from the 7s to the low 9s. Her ped neph is getting concerned with her inablility to build up her levels to normal levels. All other levels are good right now except the heme. Has anyone else had this problem and if so how is it being treated. As always, any information is greatly appreciated. Thanks.