(Voice) There also are a number of Internet groups for parents hoping to locate pox parties, often to avoid vaccinating their children.

VOA: standard.2009.12.18

Availability of this freeze-dried vaccine made it, then, possible to think about vaccinating people all over the world.

冻干疫苗的应用能使医护人员,考虑向全世界人民接种疫苗

耶鲁公开课 - 生物医学工程探索课程节选