老年人由于免疫功能降低,对感染的易感性增高,故容易发生以细菌为主的各种感染。发生感染时由于机体反应差,临床表现不典型或不显著,或为原发病的症状所掩盖,就诊过迟,常难以及时确诊而贻误治疗,因此,感 The elderly due to reduced immune function, increased susceptibility to infection, it is prone to a variety of bacterial infections. When the infection occurs due to poor body response, atypical clinical manifestations or insignificant, or the symptoms of the primary disease to cover up too late, often difficult to timely diagnosis and delaying treatment, therefore, flu