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lys-0071 [83]
3 years ago
11

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

Social Studies
1 answer:
VARVARA [1.3K]3 years ago
8 0
<span>Increases in life expectancy in the united states during the twentieth century were due primarily to </span>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
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