20世紀は公衆衛生が大きく進歩した時代であった。米国の医学界は、病気の診断や治療において大きな前進を示した。多くの感染性の病気を予防するワクチンが開発され、抗生物質が、以前なら怪我や手術、出産、幼児疾患などをきわめて危険なものにしていた細菌性感染を抑止した。

  一方で、米国民も病気と個人の行動との関わりをいっそう自覚するようになった。米国公衆衛生局長官が、1964年にはじめてアメリカ国民に喫煙の害悪を警告して以来、喫煙者の割合はほぼ50％から約25％まで低下している。公共の建物や国内旅行の電車、バス、飛行機ではもはや喫煙は認められない。ほとんどの米国のレストランでは、喫煙が認められた区域とそうでない区域とが分けられている。研究によれば、肺ガン罹患率の大幅な低下と喫煙率の全国的な低下とは関連がある。

  連邦政府も国民に、定期的に運動し、たくさんの果物や野菜を摂取する、健康な食生活をするよう奨励している。今では米国民の40％以上が、日常生活の規則的な繰り返しとして、運動やスポーツをしている。果物野菜の一人当たり摂取量は、1970年以来およそ20％増加している。

• The Transforming Power of Medical Biotechnology DOS IIP, Electronic Journal, Oct. 2005
• Plant Biotechnology: Advances in Food, Energy, and Health DOS IIP, Electronic Journal, Oct. 2005
• Growing Up Healthy DOS IIP, Electronic Journal, Jan. 2005
• The Global Epidemic of Obesity DOS IIP, Electronic Journal, Jan. 2005

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• Preventing AIDS: An Investment in Global Prosperity DOS IIP, Electronic Journal, Oct. 2005
• Health Care for HIV/AIDS and other Diseases DOS IIP, Electronic Journal, Oct. 2005
• AIDS Knowledge Base This 1999 textbook on HIV disease in adults is from the University of California, San Francisco, and the San Francisco General Hospital.
• Protecting Youth From AIDS in the Developing World The U.S. Agency for International Development sponsors several programs dealing with health and lifestyle that enable youngsters to better protect themselves from HIV infection.

• The Body: An AIDS and HIV Information Resource This service of the Body Health Resources Corporation is sponsored in part by several pharmaceutical companies, and provides information in over 250 topical areas.
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• Guide to NIH HIV/AIDS Information Services Prepared by the National Library of Medicine, this is a guide to the many HIV/AIDS programs of the National Institutes of Health, with selected public health service activities
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