从1348年到1353年短短五年间，黑死病夺去了三分之一欧洲人口的生命，然而现代瘟疫爆发远远没有如此致命，实际上是因为医学的进步。
The Black Death claimed the lives of one-third of Europe's population in just five years from 1348 to 1353, but modern outbreaks have been far less deadly, even given advances in medicine.
例如，移民劳动力，2003至2007年间，在奥地利，丹麦，意大利和西班牙占据了就业增长的五分之二强，而这一时期在英国则占据了71%。
Migrant workers, for example, accounted for over two-fifths of employment growth between 2003 and 2007 in Austria, Denmark, Italy and Spain, and 71% in the same period in Britain.
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