As we know, influenza is quite a common epidemic disease. If you have the flu, you may have a sore throat and runny nose, you may cough, we call these respiratory symptoms. Meanwhile, you will also have some constitutional symptoms, like fever or chill, fatigue and body ache.
But you may think "what causes influenza?" The answer is influenza virus. There are three types of influenza virus: type A, B and C. Type A is the most common type and we often hear about it, type B and C are less talked about.
所给英文提示词语供选用。世界上已有许多国家发现了新型H1N1流感病毒(H1N1 flu virus)病例。据了解，人感染该病毒后会出现咳嗽、发烧、疲劳等症状。为了加强同学们的预防意识，(21世纪中学生英语报>正在举办征文活动，请你给该报投稿，描述感染该病毒的症状并谈一谈为了预防该病毒我们该怎么做，最后表达我们能战胜病毒的信心。提示词：cough, have a fever, feel tired, prevent, wash, exercise, sleep, believe
So we mainly talk about the type A virus. There are so many subspecies of type A that we have an exclusive naming system for it. Scientists found there are 17 types of hemagglutinin(H protein) and 10 types of neuraminidase(N protein) on the envelope of the virus. We name the virus based on the H protein and N protein. For example, H3N2 means the virus has the third type of H protein and the second type of N protein. You may often hear about "H1N1" "H3N2", now you know why people call them like that.
Nowadays, many countries in the world have found cases of the new H1N1 flu virus. It’s said that people with H1N1 flu virus will cough, have a fever and feel tired. To prevent the virus, we can do many things. Firstly, we’d better not go to places where there are many people. Secondly, we need to wash our hands often with soap and water, especially after we cough or sneeze. It's also a good habit for us to exercise regularly. It can not only help us keep fit but also improve our health against illness. And having a good sleep is important, too. People who are tired or under stress can get sick easily. And then, eat more fruit and vegetable to keep ourselves fit and strong. Last but not least, open the window and keep the air in the room fresh. If we all do these things, we will prevent the virus. So there is no need to be worried. I believe we will win through in the end。
After knowing something about influenza virus, it is important and necessary to know how to prevent you from virus. Let's imagine how you interact with environment. If you use your hands to touch something with virus and then you touch your face, that's a way for virus to get into your body. Actually the most common way is through the respiratory tract. For example, there is a sick person near you and he is coughing, the virus can get into your nose and then into your body when you breath. So it's quite important to wash your hands, avoid sick people and don't touch your face frequently. But actually the most effective way is to get vaccinated. Especially the high risk groups(little kids, elderly, pregnant women, patients with chronic disease ), it's necessary for them to get vaccinated, cause if they have a flu, they will not only have influenza symptoms but also some complications, it's quite serious, right?
There are two types of influenza vaccine––TIV(trivalent inactivated vaccine) and LAIV( live attenuated influenza vaccine). TIV contains dead viruses and we inject it in arm. Viruses in LAIV are alive but weak, so you don't need to worry about it will cause an influenza, it can only cause problems in your nose and won't cause any problems in other places.
Now people may ask" Am I completely safe after I get vaccinated?" I'm sorry to say it's not. The vaccine is 60 percent to 70 percent effective.That means you're not 100 percent isolated from the virus after you're vaccinated. And the vaccine usually takes about two weeks to take full effect. But it's still the best way to prevent you from virus.
There's another thing you should be aware of: are you eligible for vaccination? Cause the people listed below can't get vaccinated:
Allergic to eggs or vaccine
fever or acute infect