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Home Q & A Board Biology-Related Homework Help Cell Biology
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suo90821 suo90821
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7 years ago
In the early 1900s, cities such as Philadelphia reduced the incidence of typhoid fever by
A) using tertiary water treatment systems.
B) requiring residents to boil drinking water.
C) isolating human carriers.
D) filtering municipal drinking water through sand-bed filters.
E) mass vaccination of residents.
Textbook 
Microbiology: An Introduction

Microbiology: An Introduction


Edition: 11th
Authors:
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Microbiology: An Introduction
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segellocsegelloc
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7 years ago
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suo90821 Author
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#2
7 years ago
I needed this one so bad to pass, thx for the instance, case closed
Microbiology: An Introduction
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7 years ago
You're welcome
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