Immunity refers to?

• A. The ability of the body to destroy and resist infection
• B. The process of cleaning and disinfecting surfaces
• C. A chemical agent used for disinfection
• D. The rate of skin cell turnover

Answer: (A)

Immunity is the body's defense system against infection, including barriers, immune cells, antibodies, and other responses that recognize and destroy pathogens. In esthetics, this concept matters because we follow strict infection-control practices to protect both clients and practitioners, since a strong immune response helps resist disease. The other options describe sanitation (cleaning and disinfecting surfaces), a chemical disinfectant, or skin cell turnover—none of which are immunity. So immunity refers to the body's ability to destroy and resist infection.