Mucous Membrane - The moist linings of body passages and internal cavities involved with absorption and secretion of substances.⏎
Incubation Time - The period of time between exposure to an infectious agent and the appearance of symptoms of the infection or disease it causes.⏎
Germ Theory - A theory in medicine stating that microorganisms are the causative agents of infectious, contagious diseases.⏎
Infectious Disease - A type of illness caused by a pathogenic agent, including viruses, bacteria, fungi, protozoa, parasites, or abnormal proteins known as prions.⏎
Meningeal Infection - An infection of the protective membranes that cover the brain and spinal cord, known collectively as the meninges.⏎