As the weather gets cooler, northern China has gradually entered the high incidence season of influenza. Influenza is an acute respiratory infectious disease caused by influenza virus (influenza A or B virus) infection. Its main symptoms include high fever, headache, sore throat, muscle ache, etc. Influenza will not only damage the human respiratory system, but also affect the nervous and cardiovascular systems, and increase the risk of death. The annual seasonal epidemic caused by influenza has caused a serious disease burden in the world, and vaccination against influenza is an effective measure to prevent influenza. The China Center for Disease Control and Prevention reminded that vaccination of influenza vaccine one to two months before the peak of influenza epidemic can more effectively play the protective role of the vaccine, and the recommended vaccination time is September to November. Since September this year, many cities have launched free influenza vaccination for key populations. Who needs influenza vaccination most? Why do we need to be vaccinated against influenza every year? Recently, the Beijing Center for Disease Control and Prevention answered the hot issues concerned by the masses. Who needs influenza vaccination most? Some people have a higher risk of complications after influenza, and some people have frequent contact with high-risk groups of influenza, so they need to be vaccinated against influenza. The people with high risk of complications after influenza include: infants aged 6-59 months; People over 60 years old; Patients with specific chronic diseases, including chronic respiratory diseases, cardiovascular diseases, liver and kidney insufficiency, blood diseases, nervous system diseases, neuromuscular dysfunction, metabolic diseases (including diabetes), immunosuppressive diseases or those with low immune function; Women preparing to become pregnant during the flu season. People who have frequent contact with high-risk groups: staff of nursing homes, sanatoriums and other chronic disease care institutions; Family members and caregivers of infants under 6 months of age; Family members and caregivers of the elderly over 60 years old; Family members and caregivers of other people at high risk of influenza; Medical staff. Can people who have had influenza within one year be vaccinated against influenza? It can be inoculated. It is not a taboo for vaccination to have a history of influenza in the past. In addition, influenza viruses are easy to mutate, so vaccination in the current season is possible to prevent influenza viruses that are prevalent in the current season. Who is not suitable for influenza vaccination? The following people are not suitable for influenza vaccination: those who are allergic to the components contained in the vaccine, including excipients, formaldehyde, Triton X-100, etc; Other people with severe allergic constitution; Patients with a history of Guillain Barre syndrome; Uncontrolled epilepsy and other progressive nervous system diseases. In addition, severe patients with various diseases should use with caution; Patients with acute fever, acute infection and acute attack of chronic diseases should be vaccinated after recovery. For vaccines of different types and manufacturers, the vaccination taboos listed in the instructions are slightly different. Please refer to the vaccine instructions for details. Why do we need to be vaccinated against influenza every year? Because influenza virus mutates very quickly, almost every year, and antibodies induced by different mutant strains have no cross protection or weak cross protection against different strains. The World Health Organization closely tracks the variation of influenza viruses and regularly publishes the strains used for vaccine manufacturing every year. Influenza vaccine contains three or four strains. Every year, the epidemic strain of influenza virus changes, and the corresponding strain formula of influenza vaccine also changes. Therefore, it is necessary to vaccinate the latest influenza vaccine every year to achieve the preventive effect. What are the precautions before influenza vaccination? The following preparations should be made before vaccination: understand the taboos of influenza vaccine; Know your physical condition. If you are not sure whether you belong to the people who are forbidden to use influenza vaccine with caution, you should go to the vaccination clinic to consult with the doctor and ask the doctor to help you decide whether you can vaccinate; Take a good rest to keep your body in a better physiological state; Ask the local disease prevention and control department about the distribution of vaccination clinics and vaccinate nearby. In addition, when you go to the vaccination clinic, you should abide by the epidemic prevention and control regulations of the vaccination clinic, and cooperate in completing the epidemic prevention measures such as temperature measurement, code scanning and inspection. What should be paid attention to when vaccinating? Avoid fasting vaccination; Ask the outpatient doctor for the informed consent for vaccination and fill in the informed consent truthfully; After vaccination, stay at the vaccination site for 30 minutes. What to do after vaccination? Ensure the cleanness of the inoculation site; Observe the signs within one day after inoculation; In case of persistent fever, go to the nearest hospital and report to the vaccination unit. (Outlook New Times)