流感季提前发力：CDC数据显示全美流感住院一周3334例，一个月内近三倍，加州检测阳性率约9.5%
美国流感季今年来得格外早。据 Becker's Hospital Review 10月12日引述美国疾病控制与预防中心（CDC）数据报道，截至10月3日的一周，全美实验室确诊流感住院达3,334例，高于前一周的2,572例，更远高于9月5日当周的1,133例——一个月内接近三倍。全国住院率升至每10万人1.0例，而9月初为0.3例。
分年龄看，65岁及以上长者住院率最高，为每10万人3.3例；50至64岁为0.9例，0至4岁幼儿为0.8例，最年长和最年幼两个群体的比率都在上升。
地区上，西部走在最前面。前FDA局长斯科特·戈特利布（Scott Gottlieb）对CNBC表示，加州已出现全面流感流行，当地流感检测阳性率约9.5%，接近上季约11.5%的峰值，而现在季节还非常早；这一数字与CDC第九区（包括加州、亚利桑那、夏威夷和内华达）数据吻合，全国阳性率为3.6%。他还表示，住院率约为每10万人1.1例，而去年同期约为0.2例，病例在南方也在上升；流感通常呈区域性流行，若加州趋势扩散，可能预示一个严峻的流感季。
CDC方面表示，全国流感活动「高于往年同期通常观察到的水平」，但仍在预期季节性波动范围内。（来源：Becker's Hospital Review 2026年10月12日报道，数据为CDC统计）
Flu Season Starts Early: CDC Data Show 3,334 Hospitalizations in One Week, Nearly Triple in a Month
The U.S. flu season is off to an early start. Weekly lab-confirmed flu hospitalizations nearly tripled between early September and early October, according to CDC data reported by Becker's Hospital Review on Oct. 12. Hospitals reported 3,334 flu admissions in the week ending Oct. 3, up from 2,572 the week before and 1,133 in the week ending Sept. 5. The national admission rate rose to 1.0 per 100,000 people, from 0.3 in early September.
Adults 65 and older had the highest admission rate at 3.3 per 100,000, followed by adults ages 50 to 64 at 0.9 and children ages 0 to 4 at 0.8, with rates rising in both the oldest and youngest groups.
The West is furthest ahead. Former FDA commissioner Scott Gottlieb told CNBC that California has a full-on flu epidemic, with test positivity there running about 9.5% — close to last season's peak of about 11.5% and still very early in the season — matching CDC data for HHS Region 9 (Arizona, California, Hawaii and Nevada), while national positivity was 3.6%. He put the hospitalization rate at about 1.1 per 100,000, compared with about 0.2 at this point last year, and said cases are also rising in the South. The CDC said national activity is higher than typically observed at this time of year but remains within expected seasonal variation. (Source: Becker's Hospital Review, Oct. 12, 2026; CDC data)
图片来源：医护人员为水兵接种流感疫苗，公有领域（美国海军照片，Wikimedia Commons）
