MOSQUITOES may pose a big threat this summer if no immediate action is taken to control the pest that proliferates fast in standing water left by the rainy season, local health officials said. Abundant rainfall and a fast rising temperature after the plum rain season that ended on Monday is ideal for mosquito breeding. June, July and August are the peak breeding season for mosquitos in Shanghai. Mosquito density normally doubles in June, compared with May. "We haven't worked out the density this June but it definitely will be much higher than last month's," said Leng Peien, a department director with the Shanghai Center for Disease Control and Prevention. "If no effective measures are taken, mosquitoes will explode in number due to the hot and humid weather." A 10-day anti-mosquito campaign will be launched citywide by the Shanghai Patriotic Health Campaign Commission tomorrow, with a focus on construction sites, Metro stations, residential areas, undergroun
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