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plague – n. a disease that causes death and that spreads quickly to a large number of people
lymph node – n. any one of many rounded masses of tissue in the body through which lymph passes to be filtered and cleaned
resistant – adj. giving, capable of, or exhibiting resistance — often used in combination, such as a drug-resistant strain of virus
insecticide – n. a chemical product that is used to kill insects
antibiotic – n. medical. a drug that is used to kill harmful bacteria and to cure infections
pneumonia – n. medical. a serious disease that affects the lungs and makes it difficult to breathe. (Pneumonic is the adjective form.)
