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总结
多家媒体援引CDC等数据称，美国本季流感活动已接近或可与去年冬季严重流感季相提并论。监测显示“类流感”就诊活动升至纪录高位，流感水平被指为25年来最高，约30个州处于CDC流感分级的最严重档。卫生官员警告疫情可能进一步加重。专家同时表示，尽管出现新毒株迹象，现有流感疫苗仍具保护效果，建议公众尽快接种并加强个人防护，以减轻对医疗系统的压力。
正文
Flu season already rivals last winter's harsh epidemic PBS Flu reaches highest levels in the US in 25 years CNN 30 states now in worst tier for CDC flu designation as officials warn it'll get worse The Independent Flu vaccines still effective despite new strain, UW-Madison doctor says WPR Flu-like illness activity now at highest rate on record, new CDC data shows ABC News
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