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Title: Why were incidents of typhoid fever reduce by 70 percent in the early years of the twentieth ... Post by: Twitchin on Jan 15, 2018 Why were incidents of typhoid fever reduce by 70 percent in the early years of the twentieth century?
A) improvements in public sanitation B) expanded transportation networks C) limits on immigration D) discovery of a new vaccine Title: Why were incidents of typhoid fever reduce by 70 percent in the early years of the twentieth ... Post by: Aseize on Jan 15, 2018 Content hidden
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