epidemic – n. when a disease spreads quickly and affects many people at the same time

relapse – v. a return to bad behavior that you had stopped doing

network – n. a system of interconnected things

stability – n. firmness or strength

scan – v. to examine systematically

reward – n. something that is given in return for some service

flaw – n. a small fault or weakness

insulin – n. a substance that your body makes and uses to turn sugar into energy

diabetes – n. a serious disease in which the body cannot properly control the amount of sugar in your blood because it does not have enough insulin

screen – v. to examine methodically in an effort to separate into different groups