据世卫组织估计，有三分之一的世界人口感染了结核分支杆菌。
WHO estimates that one-third of the world's population is infected with Mycobacterium tuberculosis.
世卫组织今日在其第二份全球烟草流行报告中指出，2008年世界人口只有5.4%受到全面无烟法律的保护，比2007年的3.1%有所增加。
Only 5.4% of the world's population was covered by comprehensive smoke-free laws in 2008, up from 3.1% in 2007, WHO reported today in its second report on the global tobacco epidemic.
世界卫生组织对此持相同看法，并表示如果不对猪流感进行有效防控，那么感染人群将会达到世界人口的三分之一——二十亿。
The World Health Organisation concurred, saying that if unchecked, swine flu could affect almost a third of the population – 2 billion people.
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