pandemic – n. an event in which a disease spreads very quickly and affects numbers of people over a wide area

monitor – v. to observe or study the progress or quality of something

impress – v. to cause (someone) to feel respect or interest

stigma – n. a mark of dishonor linked to an event, person or quality; a series of unfounded ideas or beliefs that a society or group of people has about something

sanitation – n. conditions related to public health

migration – n. the movement of people to a new area in order to find work or better living conditions