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1.The spread of infectious diseases is a major public health concern.
传染病的传播是公共卫生的一大关注点。
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2. The development of antibiotics has greatly reduced the incidence of infectious diseases.
抗生素的发展大大降低了传染病的发病率。
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3.Infections caused by resistant bacteria can be more difficult to treat.
由耐药细菌引起的感染可能更难治疗。