DALLAS — Officials in Dallas, Texas, have stepped up efforts to combat West Nile virus after the deaths of 10 people there. West Nile has struck all over the continental United States in recent weeks, but Dallas has been the hardest hit. Officials there are fumigating on the ground and in the air, targeting specific mosquitoes which spread the disease. The aerial and ground fumigation programs are blanketing around 1,400 square kilometers of the county, but ...
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