RT Book, Section A1 Levinson, Warren A1 Chin-Hong, Peter A1 Joyce, Elizabeth A. A1 Nussbaum, Jesse A1 Schwartz, Brian SR Print(0) ID 1190865015 T1 Hypersensitivity (Allergy) T2 Review of Medical Microbiology & Immunology: A Guide to Clinical Infectious Diseases, 17e YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264267088 LK accessmedicine.mhmedical.com/content.aspx?aid=1190865015 RD 2024/03/29 AB Hypersensitivityreactions are exaggerated or inappropriate immune responses to benign antigens. It is the immune response, not the antigens, that is harmful to the host. Usually, hypersensitivity reactions occur in response to external, or “non-self,” antigens (covered in this chapter), whereas autoimmune reactions (see Chapter 66) occur in response to internal, or “self,” antigens.