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By Yiamyut Sutthichaya |
<p><span><span><span><span><span><span><span>The rainy season comes and goes, leaving behind hundreds of thousands dengue fever patients. Each year, hundreds die of the disease. The recurring outbreak was bad enough before. Now mosquitoes have developed improved resistance to control measures, creating a new challenge for public health officials.</span></span></span></span></span></span></span></p>