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２０世纪期间，美国人的健康水平和期望寿命有了很大的提高。１９００年以来，美国人的平均期望寿命延长了３０年以上，而这延长的３０多年中有２５年要归功于公共卫生的进步。《发病率与死亡率周刊》（ＭＭＷＲ）将对美国的十大公共卫生成就进行系列报道，概述于下：１．预防?
During the 20th century, Americans’ health and life expectancy have greatly improved. Since 1900, the average life expectancy of Americans has been extended by more than 30 years, while 25 years of this 30-year extension have been attributed to public health progress. The Journal of Morbidity and Mortality (MMWR) will feature a series of coverage of the top ten public health achievements in the United States, as outlined below: 1. prevention?