1. What are the discomforts of influenza? During the flu epidemic in winter and spring, you need to suspect that you have the flu if you have one of the following: (1) fever with acute respiratory symptoms such as cough and/or sore throat; (2) fever with acute exacerbation of existing chronic lung disease; (3) fever in infants and children; (4) new respiratory symptoms or exacerbation of existing respiratory symptoms in the elderly; (5) fever or low body temperature in seriously ill patients. If you have one of these conditions, when you go to the hospital, a rapid test for influenza virus antigen will usually be performed based on your illness, and you will wait about 20 to 30 minutes for the report to be issued, and if it is positive, the diagnosis of influenza is clinically clear. This is when you should start taking anti-flu virus medication. If the test is negative and your doctor launches a likely flu based on your condition, you will also be given an anti-flu medication. For some patients, such as those who have pneumonia and are seriously ill, they can have nasopharyngeal or lung secretions retained and sent to the Guangzhou Center for Disease Control and Prevention (also called CDC) to check for influenza virus nucleic acid, and if the test is positive, the diagnosis can be confirmed. 2.How to treat the flu? First of all, if you suspect that you have the flu, if you have a fever or low temperature, or if you have a cough or sore throat, or if you cannot breathe (shortness of breath or difficulty), or if you have a chest X-ray that says it is pneumonia, you need to go to the hospital immediately. Once the flu is diagnosed, your doctor will tell you to take anti-flu medication as soon as possible, the sooner the better. It is best to start taking them within 2 days of the onset of symptoms, usually for 5 days, and if you are not well after 3 to 5 days, you will have to take them twice as long. Whether you are an adult or a child, an elderly person or a pregnant woman, you should take it. There are only benefits for the pregnant woman and the fetus, and there are no side effects for the fetus. If severe pneumonia, and combined bacterial infection, or combined with other serious medical conditions, such as elderly patients often accompanied by respiratory, cardiovascular system and other underlying diseases, or influenza viral myocarditis, heart failure, acute myocardial infarction, etc., there are life-threatening. It will need to be hospitalized immediately, timely rescue and treatment. 3.What are the drugs used to fight against influenza antiviral drugs? The anti-influenza virus drugs used in hospitals now are oseltamivir (trade name “kovir”, or “Tamiflu”), which is the first-line drug and is an effective drug for influenza. There are also zanamivir inhalation powder nebulizer, paramivir injection, etc. These two drugs are more expensive and are usually used for patients who cannot take medication. 4.If someone in my family or a colleague or classmate has the flu, how do I prevent it? Taking antiviral medication for influenza prevention is generally not recommended. The use of antiviral medication for prevention in healthy children or adults due to potential exposure in the community, schools, vacation camps or other settings is discouraged. Antiviral prophylaxis is not recommended for those who have been exposed for more than 2 days. Populations for which antiviral drug prophylaxis may be considered: 1) persons at high risk who have not established stable immunity after vaccination (within 2 weeks of vaccination); 2) persons at high risk of comorbidities who have not been vaccinated because of contraindications or who have difficulty obtaining effective immunity after vaccination; 3) health care workers or children ≥1 year of age who are in close contact with persons at high risk for complications from influenza; family members of nurses during an influenza outbreak or residing in long-term nursing facility population. 5.If it is influenza season, what should be done to prevent it? First of all, you should pay attention to exercise and strengthen your resistance. Increase or decrease your clothes according to the weather. During the flu season, do not go to crowded and unhygienic public places or homes of patients suspected of having the flu. Ventilate your room frequently and keep it clean. Do not contact with sick birds and animals. Drink more water, increase nutrition, just eat more high protein, more vitamins, just eat more fresh fruits. Flu vaccination is recommended, which is recognized worldwide as an effective way to prevent influenza. Please note: Prevent the flu during flu season!