Vector - An organism (usually an arthropod such as a flea, mosquito, or tick) that carries an infectious agent from one host to another.⏎
Yeast - A broad group of microscopic fungi that includes harmless forms of yeast used in baking and alcoholic fermentation as well as pathogenic species that can cause disease. ⏎
Vaccine - A biological preparation that improves the immune system’s ability to recognize and destroy harmful infectious agents.⏎
RNA - Short for ribonucleic acid, RNA is a molecule with long strands of nucleic acids containing a nitrogenous base, a ribose sugar, and a phosphate. RNA is responsible for controlling a number of chemical activities, including protein synthesis, within cells.⏎