Incubation Time - The period of time between exposure to an infectious agent and the appearance of symptoms of the infection or disease it causes.⏎
Immunization - The process of strengthening the body’s defense against a particular infectious agent, often accomplished by receiving a vaccine.⏎
Infection - The entry, establishment, and replication of pathogens inside a host organism.⏎
Immune System - The system of biological structures and processes that protects the body from foreign substances, including pathogens.⏎
Mucous Membrane - The moist linings of body passages and internal cavities involved with absorption and secretion of substances.⏎