Influenza is an acute viral respiratory disease that affects persons of all ages and is associated with millions of medical visits, hundreds of thousands of hospitalizations, and thousands of deaths during annual winter epidemics of variable severity in the United States. Elderly persons have the highest influenza-associated hospitalization and mortality rates. The primary method of prevention is annual vaccination. Early antiviral treatment has the greatest clinical benefit; otherwise, management includes adherence to recommended infection prevention and control measures as well as supportive care of complications.

中文翻译：

---

流感

流行性感冒是一种急性病毒性呼吸道疾病，会影响各个年龄段的人，并且在美国每年因严重程度不同而不同的冬季流行病中，有成千上万的就诊，数十万的住院治疗和数千的死亡。老年人与流感相关的住院和死亡率最高。预防的主要方法是每年接种疫苗。早期抗病毒治疗具有最大的临床获益；否则，管理包括遵守建议的感染预防和控制措施以及对并发症的支持性护理。