What types of allergic reactions are there?



In 1963, two British immunologists, Robert Coombs and Philip Gel classified hypersensitivity reactions into four different types.

  • Type I – Immediate
  • Type II – Cytotoxic
  • Type III – Immune complex-mediated
  • Type IV – Cell-mediated reactions or delayed hypersensitivity

Click here to learn more about these four types of allergic reactions.