Which process indicate a transfusion reaction because of a blood typing mismatch?

A transfusion reaction due to a blood typing mismatch typically occurs when the recipient's immune system identifies the transfused blood cells as foreign. This triggers an immune response, leading to the destruction of the transfused red blood cells, which can result in symptoms such as fever, chills, Back pain, and dark urine. The most common type of mismatch involves ABO or Rh blood groups, where incompatible blood types can cause severe and potentially life-threatening reactions. Monitoring for these reactions is crucial during and after transfusion procedures.