For the railway station in Osaka, Japan, see Universal City Station. Universal City/Studio City, formerly Universal City, is a rapid transit station on the Red Line of the Metro Rail in Los Angeles, California. Serving Universal Studios Hollywood and City Walk.
Specific immunity is the body's learned immune response to disease-causing foreign substances, also referred to as pathogens or antigens. It is also commonly called acquired immunity or adaptive immunity.
Active immunity is stimulation of the immune system to produce antigen-specific humoral (antibody) and cellular immunity. Unlike passive immunity, which is temporary, active immunity usually lasts for many years, often for a lifetime. One way to acquire active immunity is to have the natural disease.