Final answer:
The three types of hypersensitivity are immediate, delayed, and autoimmunity.
Step-by-step explanation:
The three types of hypersensitivity are immediate, delayed, and autoimmunity.
Immediate hypersensitivity, also known as Type I hypersensitivity, occurs when a presensitized individual is exposed to an allergen and triggers a rapid immune response. Examples include allergies to pollen, animal dander, and insect venom.
Delayed hypersensitivity, also known as Type IV hypersensitivity, is a T-cell mediated response that occurs hours to days after exposure to certain antigens. Examples include contact dermatitis and poison ivy.
Autoimmunity is a maladaptive immune response toward self-antigens, resulting in the destruction of the body's own tissues. Examples include rheumatoid arthritis and multiple sclerosis.