White Blood Cell - A special type of cell that works as part of the immune system to defend the body against disease and infection.⏎
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. ⏎
Universal Flu Vaccine - A vaccine that is effective against all forms of the influenza virus.⏎