All of the Following are True of Hypersensitivity EXCEPT

Question

All of the following are true of hypersensitivity EXCEPT
A)it occurs in the presence of an antigen.
B)it is synonymous with "allergy."
C)it occurs when an individual is exposed to an allergen for the first time.
D)it is due to an altered immune response.
E)it requires previous exposure to an antigen.

Accepted Answer

Hypersensitivity is an exaggerated or inappropriate immune response to an antigen that has been previously encountered. Therefore, it always requires previous exposure to an antigen.