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总结
美国麻疹疫情继续扩大。多家媒体援引疾控机构与地方卫生部门信息称，今年全美麻疹病例已超过2000例，创约30年来新高；南卡罗来纳州近期出现新增病例，使美国距离失去“麻疹已消除”地位更近。州卫生机构呼吁居民检查并更新疫苗接种，强调麻疹传染性强，未接种或免疫不足人群风险更高。疫情上升或加重公共卫生系统防控压力，并引发对疫苗覆盖率与社区传播的担忧。
正文
New measles cases in South Carolina put U.S. on the verge of losing elimination status NBC News US measles cases surpass 2,000, highest in 30 years: CDC ABC News US measles outbreak tops 2,000 known infections CIDRAP State health agency urging South Carolina residents to get updated vaccines WIS News 10 US measles cases surpass 2,000 this year The Hill
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