Definitions for "Active immunity"
conferred when a disease or an immunization triggers production of an antibody or antitoxin (also active immunization).
the production of antibodies against a specific disease by the immune system. Active immunity can be acquired in two ways, either by contracting the disease or through vaccination. Active immunity is usually permanent, meaning an individual is protected from the disease for the duration of their lives.
Immunity acquired after stimulation with an antigen by natural infection or other exposure.