mild - adj. not strong in action or effect

symptom - n. a change in the body or mind which indicates that a disease is present

lesson - n. something learned through experience

quarantine - n. the situation of being kept away from others to prevent a disease from spreading

fund - n. an amount of money that is used for a special purpose

pandemic - n. an occurrence in which a disease spreads very quickly and affects a large number of people over a wide area

slum - n. an area where poor people live and the buildings are in bad condition

comfortable - adj. not causing any physically unpleasant feelings