active immunity(n = noun.state) - a form of acquired immunity in which the body produces its own antibodies against disease-causing antigens;
is a kind of acquired immunity

acquired immunity, active, active agent, active air defense, active application, active birth, active citizen, active matrix screen, active placebo, active site, active transport, active trust, active voice, be active, diplomatic immunity, granting immunity, highly active antiretroviral therapy, immunity, innate immunity, natural immunity, official immunity, passive immunity, racial immunity, sovereign immunity, testimonial immunity, transactional immunity, use immunity