Step 1 → Immunology Transfusion ReactionsPreview this topic sectionPreview the conditions. Plans unlock the full Step 1 details when you need them. Free Biochemistry Free Microbiology Plans Transfusion Reactions conditions Acute Hemolytic Transfusion Reaction Delayed Hemolytic Transfusion Reaction Febrile Nonhemolytic Transfusion Reaction Transfusion-Related Acute Lung Injury (TRALI)