Delayed hemolytic transfusion reaction is a type of transfusion reaction.   
This can occur one to four weeks after the transfusion.
One way this can occur is if a person without a Kidd blood antigen receives a  Kidd antigen in a transfusion . A hemolytic reaction can occur between 3 and 14 days as a result of a secondary immune response, with a drop in hemoglobin level, fever, jaundice, or hemoglobinuria. 
References [ edit ]
^ Noizat-Pirenne F, Bachir D, Chadebech P, et al. (December 2007). "Rituximab for prevention of delayed hemolytic transfusion reaction in sickle cell disease". Haematologica 92 (12): e132–5. doi: 10.3324/haematol.12074. PMID 18055978.
^ Talano JA, Hillery CA, Gottschall JL, Baylerian DM, Scott JP (June 2003). "Delayed hemolytic transfusion reaction/hyperhemolysis syndrome in children with sickle cell disease". Pediatrics 111 (6 Pt 1): e661–5. doi: 10.1542/peds.111.6.e661. PMID 12777582.
^ Elenga N, Mialou V, Kebaïli K, Galambrun C, Bertrand Y, Pondarre C (December 2008). "Severe neurologic complication after delayed hemolytic transfusion reaction in 2 children with sickle cell anemia: significant diagnosis and therapeutic challenges". J. Pediatr. Hematol. Oncol. 30 (12): 928–30. doi: 10.1097/MPH.0b013e31818c9172. PMID 19131783.
^ "Complications of Transfusion: Transfusion Medicine: Merck Manual Professional".
^ Vassiliki Kazakou, MD; Alexandra Kousoulakou, MD; Euthemia Melissari, MD (2007). "Delayed hemolytic transfusion reaction by a Kidd antibody after heart surgery: Case report and review of the literature". The Journal of thoracic and cardiovascular surgery 133 (5): 1364–5. doi: 10.1016/j.jtcvs.2006.11.022. PMID 17467459.