Exam (elaborations)
Nats 1670 Final Exam
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Nats 1670 Final Exam What was the life expectancy in the early 1900's? - Under the age of 50, with a 25% child mortality rate. When was the first vaccine created? - 1880 ____________ _____________ can reduce life expectancy dramatically, due to the lack of __________________. - INFECTIOU...
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