Outcome of spraying to combat West Nile virus unclear

Outcome of spraying to combat West Nile virus unclear

August 18, 2012 5:20 AM

Planes have taken to the air over Dallas for two straight nights to spray pesticides in the hope of killing mosquitoes that carry West Nile virus. Rebecca Jarvis and Ben Tracy asked Joseph Conlon, technical adviser to the American Mosquito Control Association, about the spraying, which has been controversial.

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