Fan fiction, also called fanfiction, is derivative fiction written using another author's characters and universe. Fanfiction authors write stories about their favorite characters from books, movies, or comics.
Antibodies, also called immunoglobulins, are proteins manufactured by the body that help fight against foreign substances called antigens. When an antigen enters the body, it stimulates the immune system to produce antibodies. (The immune system is the body's natural defense system.) The antibodies attach, or bind, themselves to the antigen and inactivate it. Every healthy adult's body has small amounts of thousands of different antibodies.
Most antigens are proteins that serve as the stimulus to produce an immune response. The term antigen comes from ANTI-body GENerating substances. Here are the steps in an immune response: When an antigen is detected by a macrophage (as describe above under phagocytosis), this causes the T-cells to become activated.