outbreak – n. a sudden rise in the number of cases of a disease; a sudden or violent increase in activity

transmission – n. the act or process by which something is spread or passed from one person or thing to another

quarantine – n. a 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

respiratory – adj. of or relating to breathing or the organs of the body that are used in breathing

syndrome – n. a group of conditions which often are found at the same time
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