Specific immunity refers to the immune response in which the body’s immune cells produce antibodies against a specific antigen, which can kill that specific antigen. 1. Specific immunity, also known as acquired immunity or adaptive immunity, refers to the production of specific antibodies by the body after being infected with a specific antigen or vaccinated against that specific antigen. When the body is attacked by the antigen again, the specific antibodies in the body will react with the antigen and specific immunity will occur to protect the body from being attacked. 2. Specific immunity is a kind of cellular immunity, mainly involving T lymphocytes. When the body is attacked by antigens, T lymphocytes are activated, causing T lymphocytes to become sensitized lymphocytes and participate in the immune response process.