 This subsequently leads to cell lysis, tissue damage or loss of function through mechanisms such as

The activation of the complement system results in opsonization, the agglutination of red blood cells, cell lysis, and cell death.These reactions usually take between 2 and 24 hours to develop.An example of complement dependent type II hypersensitivity is an acute haemolytic transfusion reaction following transfusion of ABO incompatible blood.