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Polluted water, Zika and superbugs are three of the major health concerns at the Rio Olympics.
Polluted water, Zika and superbugs are three of the major health concerns at the Rio Olympics.

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    Health concerns overshadow Rio Olympics

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Health concerns overshadow Rio Olympics

Polluted water, Zika and superbugs - CNN's Dr. Sanjay Gupta looks at the many health concerns plaguing Rio de Janeiro as the Olympic games loom.

Health concerns overshadow Rio Olympics

Polluted water, Zika and superbugs - CNN's Dr. Sanjay Gupta looks at the many health concerns plaguing Rio de Janeiro as the Olympic games loom.