Mosquito-repellent incense is useless?

Summer mosquito, many citizens have used concerns about traditional mosquito-repellent incense, mosquito coils toxicity how much? What should be paid attention to in use? For this, city centers for disease control and prevention, vector control of the experts to answer the above questions. According to introducing, Shanghai mosquito-repellent incense poisoning cases are rare. Huashan hospital tropical diseases research director guang-feng shi, said professor mosquito-repellent incense toxicity is determined by its contain pesticide dosage size, to a certain extent is toxic, normal mosquito-repellent incense general human hazards. But still use mosquito-repellent incense must pay attention to the method. Citizens should put the mosquito-repellent incense vents, when using a usage not too much

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