Question

polio is caused by _________(air / water)​

Answer 1

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Polio is spread when the stool of an infected person is introduced into the mouth of another person through contaminated water or food (fecal-oral transmission). Oral-oral transmission by way of an infected person's saliva may account for some cases.

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Answer 2

Answer: water

Explanation:

Polio is caused by poliovirus, an enterovirus that is spread by swallowing food or water contaminated with stool from an infected person or by touching a contaminated surface, then touching the mouth.