VOA慢速英语:流感病毒可能比战争更致命

influenza – n. a common illness that is caused by a virus and that causes fever, weakness, severe aches and pains, and breathing problems

pandemic – adj. occurring over a wide geographic area and affecting an exceptionally high proportion of the population

archive – n. a place in which public records or historical materials (such as documents) are preserved

suffocate – v. to die because you are unable to breathe

exposure – n. the fact or condition of being affected by something or experiencing something : the condition of being exposed to something

immunity – n. medical : the power to keep yourself from being affected by a disease — usually + to (They have developed immunity to the virus.)

strain – n. a group of closely related plants or animals

circulate – v. to pass from person to person or place to place

efficacy – n. the power to produce a desired result or effect

prevalent – adj. accepted, done, or happening often or over a large area at a particular time : common or widespread

initiative – n. a plan or program that is intended to solve a problem