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1、Speaker: Chen jiaMaker: Xue bei Zhao yanling Wang Xiqi Content1 What Is the Flu?2 Flu Symptoms3 How Flu Works?4 Types of Flu5 Prevention 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

2、 or sinus problems. What Is the Flu?Second definition The 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 a

3、re also less likely to cause serious complications. Flu Symptoms1、Cough2、Sore throat(喉嚨痛)3、Headaches4、Muscle or body aches5、Fever or feeling feverish/chills（發(fā)燒或感覺(jué)發(fā)熱/寒戰(zhàn)）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

4、 immune system, leaving it vulnerable to more serious infections.High-risk individuals in particular are susceptible to serious complications.such as: Bacterial pneumonia(細(xì)菌性肺炎) Dehydration(脫水) Sinus problems and ear infections (primarily in children) 竇問(wèn)題和耳部感染（主要是兒童） Worsening of preexisting conditi

5、ons, 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 bloods

6、tream . 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 time

7、s 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. Treating flu within 48 hours of symptoms is best. Prescription antiviral drugs may cut the time youre sick. Types of Flu There are three type

8、s of flu viruses: A, B, and C. Influenza A can infect a range of mammals and birds as well as humans, while types B and C infect mainly humans. H1N1 Influenza (Swine Flu)H1N1 influenza is a type of influenza A. It is known as swine flu because it primarily infects pigs. Transmission to humans is unc

9、ommon, but it can occur if humans come into contact with infected pigs or with environments contaminated by the virus. An infected human can then spread the disease to other humans. Although it also circulates in pigs, you cannot get it by eating properly handled and cooked pork or pork products.The

10、 best way to prevent the H1N1 flu is to get the seasonal flu vaccine. You should also follow our advise to keep yourself healthy during flu season.H1N1 Influenza (Swine Flu) H5N1 Bird FluThe avian influenza virus, or bird flu, occurs naturally in wild birds, but does not make them sick. Because the

11、virus is very contagious among birds, avian influenza virus can be deadly if transmitted to domesticated birds. Human infections are caused by transmission of the Influenza A virus from infected birds to humans. H5N1 Bird FluAlthough H5N1 does not usually infect humans, nearly 650 cases of human cas

12、es of H5N1 have been reported from 15 countries since 2003. Fever and coughAcute respiratory distressShortness of breath/difficulty breathingAbdominal painDiarrheaSymptoms How can we prevent highly pathogenic H5N1 virus infection? The best way to prevent infection is to avoid any contact with sick o

13、r dead poultry. This includes avoiding visiting live poultry markets that may be infected with H5N1 when traveling. Also avoid sick people who might have H5N1 virus infection in affected countries. H7N9 is a new type of bird flu, avian flu discovered in Shanghai and anhui first at the end of march i

14、n 2013 . Fighting Against H7N9 Bird Flu we had successfully developed the vaccine for the H7N9 bird flu virus, after the flu strain had left more than 130 people infected, with 45 fatalities reported. Vaccination is the best way to protect yourself from the flu. There are additional steps you can ta

15、ke to keep yourself and your family healthy this flu season.Prevention VACCINATED Everyone 6 months of age and older should get vaccinated against the flu. TAKE PRECAUTIONSTake everyday precautions, like washing your hands, to protect your health. ANTIVIRAL MEDICATIONSIf you are exposed to or caring

16、 for someone with the flu, talk to your doctor about preventive antiviral medications.Prevention There are steps you can take in your daily life to help protect you from getting the flu.1.Wash your hands often with soap and water or an alcohol-based hand rub.2.Avoid touching your eyes, nose, or mout

17、h. Germs spread this way.3.Try to avoid close contact with sick people.Prevention 5.Practice good health habits. Get plenty of sleep and exercise, manage your stress, drink plenty of fluids, and eat healthy food.4.Cover your nose and mouth with a tissue when you cough or sneeze. Throw the tissue in the trash after you use it.Prevention