Morbidity - The relative occurrence of a disease or a condition that causes illness.⏎
Host - An organism that harbors a parasite or another organism where there is a symbiotic relationship between the two organisms. In some cases, the relationship is commensal, or mutually beneficial, but in the case of a parasite and host, the host may be hurt by the parasite's presence.⏎
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.⏎
Interferon - A type of protein produced by cells of the immune system that help keep viruses, bacteria, and cancer cells from growing.⏎