Mucous Membrane - The moist linings of body passages and internal cavities involved with absorption and secretion of substances.⏎
Infectious Disease - A type of illness caused by a pathogenic agent, including viruses, bacteria, fungi, protozoa, parasites, or abnormal proteins known as prions.⏎
Intravenous - The use of veins through which medications and solutions are administered.⏎
Immunization - The process of strengthening the body’s defense against a particular infectious agent, often accomplished by receiving a vaccine.⏎
Immune System - The system of biological structures and processes that protects the body from foreign substances, including pathogens.⏎