Immune System - The system of biological structures and processes that protects the body from foreign substances, including pathogens.⏎
Interferon - A type of protein produced by cells of the immune system that help keep viruses, bacteria, and cancer cells from growing.⏎
Microbe - Sometimes referred to as a microorganism, a microbe is an organism that is microscopic and thus invisible to the naked eye. ⏎
Intravenous - The use of veins through which medications and solutions are administered.⏎
Morbidity - The relative occurrence of a disease or a condition that causes illness.⏎