The Centers for Disease Control and Prevention (CDC) is testing wastewater across the United States to track the spread of influenza virus, including the avian influenza A virus H5N1 outbreak. The CDC and its partners are sampling wastewater from 689 sites to detect influenza A virus by quantitative PCR. The surveillance and reporting system also includes monkeypox and SARS-CoV-2.

Data from May 5–18 from 281 sampling locations show high levels of influenza A virus at three sites in two states, and a further two states where levels were above average compared with historic baseline samples. Once the surveillance system identifies unusual flu activity, the CDC works with partners to understand the factors that may contribute to an increase.

美国疾病控制与预防中心 (CDC) 正在对美国各地的废水进行检测，以追踪流感病毒的传播情况，包括甲型禽流感病毒 H5N1 的爆发。 CDC 及其合作伙伴正在对 689 个地点的废水进行采样，通过定量 PCR 检测甲型流感病毒。监测和报告系统还包括猴痘和 SARS-CoV-2。

5 月 5 日至 18 日从 281 个采样地点采集的数据显示，两个州的三个地点的甲型流感病毒水平较高，另外两个州的甲型流感病毒水平高于历史基线样本的平均水平。一旦监测系统发现异常的流感活动，疾病预防控制中心就会与合作伙伴合作，了解可能导致流感病例增加的因素。