South Carolina's measles outbreak jumped to Washington state 5 times in 2 weeks
摘要
美国一项研究显示，随着近年来全美疫苗接种率下滑、疫情规模更大且更频繁，国内旅行带来的麻疹传播风险已高于国际输入。华盛顿州卫生官员在《NEJM Evidence》发表研究，详述南卡罗来纳州一场大规模疫情如何在2026年1月两周内通过五次独立输入事件传至该州，共导致26例居民感染，随后被扑灭。南卡疫情始于2025年10月2日，2026年4月26日宣布结束，共确诊
Since measles was declared eliminated in the US in 2000, the country's occasional cases have come mainly from international travelers—visitors from far-flung places where the virus still spreads freely — or unvaccinated US residents who return from abroad with a highly infectious souvenir. But as vaccination rates have slipped nationwide in recent years and outbreaks grow bigger and more frequent, domestic travel now poses a greater risk than international incursions.
In a study published this week in NEJM Evidence, Washington state health officials highlight that risk, detailing how an explosive outbreak in South Carolina reached their distant state through five distinct importation events over two weeks in January. In all, the introductions led to 26 cases among residents before officials stamped out the spread.
South Carolina's measles outbreak began on October 2, 2025, and was declared over on April 26, 2026. Officials confirmed 997 cases in the state during the outbreak. At the time, it was the largest measles outbreak recorded since the virus was declared eliminated, but Pennsylvania's ongoing outbreak has since surpassed it.
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