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由于我国北方自上周末以来一直持续大雾天气，有专家担忧，空气中含有的浓度较高的颗粒物很可能会导致包括肺部感染以及肺癌在内的多种呼吸道疾病。

Experts are worried that particulate matter in the air, which is in higher concentrations in North China because of the heavy fog since the weekend, may lead to various respiratory diseases including lung infections and cancer.