Some of the lymphoblasts form moderate numbers of new B lymphocytes similar to the original clone. They remain dormant in the lymphoid tissue and are called memory cells. Antibodies are gamma globulins called immunoglobulins and composed of light and heavy polypeptide chains. Allergic tendency is a phenomenon that is passed on genetically and characterized by large quantities of antibodies called reagins, or sensitizing antibodies. When the allergen enters the body, an allergen-reagin reaction takes place and subsequent allergic reaction.
Hay fever is the allergen-reagin reaction that occurs in the nose.
Type II reactions consist of food immune reactions. Type IV reactions are often referred to as a delayed hypersensitivity reaction, which may take 3 to 4 days to appear and 3 to 4 days to disappear. In some cases, the reaction can last as long as 14 days. The brain detects this pain and produces endorphins, which are similar to narcotics, to eliminate the pain. If the food is consumed regularly, the body will crave that food because it leads to the production endorphins.