Hypersensitivity reactions are exaggerated or inappropriate immunologic responses occurring in response to an allergen or antigen. There are four types of hypersensitivity reactions that include immediate hypersensitivity reactions or delayed type hypersensitivity reactions. Immediate hypersensitivity reactions occur within 24 hours…

Hypersensitivity reactions are exaggerated or inappropriate immunologic responses occurring in response to an allergen or antigen. There are four types of hypersensitivity reactions that include immediate hypersensitivity reactions or delayed type hypersensitivity reactions. Immediate hypersensitivity reactions occur within 24 hours…

Type I Type II Type III Type IV