What were the major causes of U.S. mortality in the last 100 years, and what public health measures most contributed to improvements in the health of the nation? Include at least two source citations from the readings and/or additional sources to support

What were the major causes of U.S. mortality in the last 100 years, and what public health measures most contributed to improvements in the health of the nation? Include at least two source citations from the readings and/or additional sources to support your answer.

APA format, at least 300 words, a couple references