Increases in life expectancy in the united states during the twentieth century were due primarily to

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Social Studies

Wiley

27 December, 17:44

Increases in life expectancy in the united states during the twentieth century were due primarily to

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Roman Black · Answer 1

Increases in life expectancy in the united states during the twentieth century were due primarily to The control of childhood and infectious diseases. Before the development of vaccines and antibiotics, more than 1/3 of human population dies before their old ages due to some fatal diseases that will be easily cured buy today's medical standard