1.请简要介绍一下,季节性流感在我国发病的一个基本情况,其主要危害。流感季节主要集中在哪几个月?流感是由流感病毒引起的一种急性呼吸道传染病。一般表现为急性起病、发热(可达39~40℃),伴畏寒、寒战、头痛、肌肉和关节酸痛、极度乏力、食欲减退等全身症状,常有咽痛、咳嗽,可有鼻塞、流涕、胸骨后不适、颜面潮红、眼结膜轻度充血,也可有呕吐、腹泻等症状。轻症流感常与普通感冒表现相似,但其发热和全身症状更明显。重症病例可出现病毒性肺炎、继发细菌性肺炎、急性呼吸窘迫综合征、休克、弥漫性血管内凝血、心血管和神经系统等肺外表现及多种并发症。 1. Please briefly describe a seasonal epidemic in our country a basic situation, the main hazard. Influenza season is mainly concentrated in what months? Flu is caused by the influenza virus, an acute respiratory disease. Generally manifested as acute onset, fever (up to 39 ~ 40 ℃), with chills, chills, headache, muscle and joint pain, extreme fatigue, loss of appetite and other symptoms, often sore throat, cough, may have nasal congestion, Runny nose, chest discomfort, facial flushing, conjunctival mild congestion, but also vomiting, diarrhea and other symptoms. Mild flu is often similar to the common cold, but its fever and systemic symptoms are more pronounced. Severe cases of viral pneumonia may occur, secondary to bacterial pneumonia, acute respiratory distress syndrome, shock, diffuse intravascular coagulation, cardiovascular and nervous system extrapulmonary manifestations and a variety of complications.