West Nile virus: What you should know

POSTED: 09:05 AM PDT Aug 15, 2012 

The U.S. is experiencing one of its worst West Nile outbreaks in years. Here's what you need to know about this mosquito-borne virus.

West Nile - Risk
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What is the risk of getting very sick? Your chance of developing complications or severe illness from West Nile increases if you are over 50 or you have a weakened immune system, such as if you have cancer or are pregnant.

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