slum –n. a neighborhood were buildings are in bad condition and people are very poor

hot spot –n. a place where there is danger of infection or fighting

expose –v. to be affected by, to come in contact with something like a virus

symptom –n. a change that is evidence that a disease is present

density –n. the number of, for example, people in a limited area

fatality –n. a death that results from an accident, disease or disaster