Morbidity - The relative occurrence of a disease or a condition that causes illness.⏎
Meningeal Infection - An infection of the protective membranes that cover the brain and spinal cord, known collectively as the meninges.⏎
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.⏎
Interferon - A type of protein produced by cells of the immune system that help keep viruses, bacteria, and cancer cells from growing.⏎