Where do antigens come from?
1 Answer
May 23, 2018
Antigens may originate from within the body or from the external environment.
Explanation:
They may enter the body by inhalation, ingestion or injection. Some antigens are generated within normal cells as a result of normal cell metabolism, or due to viral or intracellular bacterial infection. However, in the case of autoimmune disease, the immune system may recognise normal proteins as potential antigens. Tumor antigens can appear on the surface of the tumor.
