美国疾控中心11月13日更新流感监测：本季至少260万例患病、36000人住院、2100人死亡，类流感就诊占比3.2%高于2.9%基线
美国疾病控制与预防中心11月13日发布每周 FluView 更新称，因类流感疾病就诊的门诊就诊占比为3.2%，高于2.9%的全国基线，显示流感季已实际开始。疾控中心表示，季初流感活动高于往年同期通常水平，但活动提前上升并不必然意味着本季峰值更高或总体严重程度更大。
疾控中心估算，本季至今至少有260万例流感患病、36000人住院与2100人死亡；累计共有9584人因流感住院。本周报告新增2例儿童流感死亡，本季儿童死亡累计5例。
实验室检测方面，本周流感检测阳性率为11.3%，高于前一周的9.1%，阳性以甲型流感为主。全国多数地区流感活动处于最低或低水平，但加利福尼亚州、路易斯安那州、俄勒冈州、南卡罗来纳州、田纳西州、德州与华盛顿州处于高或非常高类别，科罗拉多州、佛罗里达州、夏威夷州、爱达荷州、马萨诸塞州、新泽西州、新墨西哥州、纽约州与波多黎各处于中等类别。
疾控中心对全年龄段的本季严重程度初步评估均为低，目前尚未在人群中确认新型流感病毒。疾控中心预计2026至2027年呼吸道疾病季与上一季大致相似，并表示目前判断何种病毒将占主导、以及是否会影响流感疫苗有效性仍为时过早。
同日发布的呼吸道疾病更新称，导至就医的急性呼吸道疾病总体水平低但在上升；全国鼻病毒与肠道病毒、呼吸道腺病毒水平偏高，废水监测中新冠病毒为中等水平，流感为低水平，呼吸道合胞病毒为非常低水平。
关联：美国疾控中心第43周流感报告：截至10月31日单周8,396例实验室确诊住院、本季累计至少170万例患病与1,400例死亡
CDC Updates Flu Surveillance on November 13: At Least 2.6 Million Illnesses, 36,000 Hospitalizations and 2,100 Deaths This Season, With Influenza-Like Illness at 3.2 Percent of Outpatient Visits, Above the 2.9 Percent Baseline
The Centers for Disease Control and Prevention said in its weekly FluView update on November 13, 2026, that the proportion of outpatient visits for influenza-like illness is 3.2 percent, above the 2.9 percent national baseline, indicating the beginning of flu season in earnest. The CDC said early-season influenza activity is higher than typically observed at this time of year, but that an earlier increase does not necessarily lead to a higher seasonal peak or greater overall severity.
The CDC estimates that there have been at least 2.6 million flu illnesses, 36,000 hospital admissions and 2,100 deaths so far this season, with 9,584 people hospitalized for flu in total. The agency noted two child deaths from flu this week, for a total of five so far this season.
Flu test positivity was 11.3 percent this week, up from 9.1 percent the week before, primarily from influenza A. Flu activity is in the high or very high category in California, Louisiana, Oregon, South Carolina, Tennessee, Texas and Washington state, and moderate in Colorado, Florida, Hawaii, Idaho, Massachusetts, New Jersey, New Mexico, New York state and Puerto Rico, while infections are minimal or low in most of the country.
The preliminary estimate of season severity is low across all ages, and no novel influenza virus has been confirmed in people. The CDC said it expects the 2026-2027 respiratory illness season to be much like last season, and that it is too early to know what viruses may predominate or whether there might be implications for flu vaccine effectiveness.
In its respiratory illness update the same day, the CDC said overall acute respiratory illness activity is low but rising, with elevated rhinovirus and enterovirus and respiratory adenovirus levels across the country. Wastewater levels of COVID-19 are moderate in most of the country, while flu is low and respiratory syncytial virus is very low.
来源：美国疾控中心
发布：GSM·美国（发布链接）
图片来源：图：电子显微镜下的流感病毒颗粒。作者与授权：Cynthia Goldsmith 摄、美国疾控中心（CDC）提供，公共领域，维基共享资源。 / Photo: Influenza virus particles under an electron microscope. Credit: Cynthia Goldsmith / CDC, public domain, via Wikimedia Commons.
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