Poor hygiene: The story of "typhoid mary" is the classic first example of epidemiology at work.
Answered 3/26/2018
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Water contamination: In the developing world, typhoid spreads through human fecal contaminated water. Unlike most kinds of salmonellosis, this form is only a human disease. There are no chickens, cattle or other fauna involved.
Answered 3/26/2018
5.7k views
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