What do you mean by immune response?

(N/A) Immune response is the reaction of the body's immune system to foreign substances,such as pathogens (bacteria,viruses,etc.),that are recognized as non-self or potentially harmful. This response involves the activation and production of specialized cells,such as $T$-lymphocytes and $B$-lymphocytes,and the secretion of proteins called antibodies. These components work together to identify,neutralize,and eliminate the invading pathogens to protect the body from disease.