VOA慢速英语:‘Highly Effective’ Ebola Vaccine Developed in Guinea

analyses – n. commentaries on a report or study

journal – n. a publication

outbreak – n. the sudden increase of disease

random – adj. chosen without plan; not targeted

contract(ing) – v. becoming sick with disease

license – n. an official document that gives you permission to do something; a permit

epidemic – n. an infectious disease moving across a wide area

game changer – n. someone or something with a very powerful influence