宾夕法尼亚州爆发数十年来美国最大规模麻疹疫情

宾夕法尼亚州正经历美国数十年来最大规模的麻疹疫情12。该州麻疹确诊病例已超过1000例12，其中兰开斯特县最为严重，报告391例病例2。疫情已导致5人死亡12，198人住院2。患者年龄段中24至49岁感染人数最多2。

除宾夕法尼亚州外，美国其他地区也出现麻疹传播。纽约州报告108例病例2，俄亥俄州报告200多例病例2，南卡罗来纳州报告997例病例2。截至10月1日，全美共3887例确诊病例2。纽约州州长凯西·霍楚尔在10月3日宣布进入公共卫生紧急状态2。美国麻疹疫苗接种率已降至95%以下2，而麻疹本土传播在2000年已被消除2。

Pennsylvania is experiencing its worst measles outbreak in more than three decades, with confirmed cases surpassing 1,000 2. The state has reported 5 deaths and 198 hospitalizations related to the outbreak 2. Lancaster County has been hit particularly hard, accounting for 391 of the cases 2.

The outbreak extends beyond Pennsylvania's borders, with neighboring states also reporting significant case numbers 2. New York State has confirmed 108 cases, while Ohio has reported more than 200 cases 2. Nationally, the United States had recorded 3,887 confirmed measles cases as of October 1 2. New York Governor Kathy Hochul declared a public health emergency on October 3 in response to the spread 2.

Health officials are preparing for the outbreak to expand further into additional regions 1. The outbreak reflects a broader immunization challenge across the country, as the national vaccination rate has fallen below 95 percent 2. Measles had been eliminated as an endemic disease in the United States in 2000 2.