dose - n. the amount of a medicine, drug, or vitamin that is taken at one time

contagious - adj. able to be passed from one person or animal to another by touching

ethnic cleansing - n. the practice of removing or killing people who belong to an ethnic group that is different from the ruling group in a country or region

isolate – v. to separate or set apart from others

quarantine - n. the period of time during which a person or animal that has a disease or that might have a disease is kept away from others to prevent the disease from spreading