预防流感-----精品课件下载.ppt

Speaker: Chen jiaMaker: Xue bei Zhao yanling Wang Xiqi. Content1What Is the Flu?2Flu Symptoms3How Flu Works?4Types of Flu5Prevention. What Is the Flu?First definitionFlu is also called the influenza. Its an infection that causes a?fever, chills, cough, bodyaches,?headaches, and sometimes earaches or?sinus problems.. What Is the Flu?Second definitionThe flu is a respiratory illness caused by the influenza virus. The flu is not the same as a cold, although they share many of the same symptoms. The cold is caused by a different virus, and it tends to have milder symptoms than the flu . Colds are also less likely to cause serious complications.. Flu Symptoms1、Cough2、Sore throat(喉咙痛)3、Headaches4、Muscle or body aches5、Fever or feeling feverish/chills（发烧或感觉发热/寒战）6、Runny or stuffy nose（流鼻涕、鼻塞）7、Fatigue (tiredness)8、Some people may have vomiting and diarrhea. Flu SymptomsThe flu also weakens the immune system, leaving it vulnerable to more serious infections.High-risk individuals in particular are susceptible to serious complications.such as: Bacterial pneumonia(细菌性肺炎)Dehydration(脱水)Sinus problems and ear infections (primarily in children) 窦问题和耳部感染（主要是儿童）Worsening of preexisting conditions, such as asthma or diabetes（哮喘或糖尿病）. How Flu Works1.The virus enters the respiratory tract.（呼吸道）2.After entering the respiratory tract , the virus starts to replicate itself. The respiratory tract becomes swollen and inflamed.3. Once inside the respiratory system , the virus enters the bloodstream . the first symptoms(cough) begin to show.. Flu and the Common ColdThe flu and the common cold have similar symptoms. It can be difficult to tell the difference between them.In general, the flu is worse than the common cold, the flu tends to be more severe and usually comes on suddenly, at times it can lead to death.Learning whether it is a cold or flu is important because the flu can have serious complications such as pneumonia （急性肺炎）or even death. T