Before World War II,most of the gains in life expectancy in the United States were due to public health advances.

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Before World War II, improvements in public health such as cleaner water, improved sanitation, and better nutrition played a significant role in increasing the life expectancy of Americans. It was only after the war that advances in medical science and technology (including the widespread use of antibiotics and the development of new surgical procedures) began to have a greater impact on life expectancy.

Before World War II,most of the Gains in Life Expectancy