Influenza is an infectious disease caused by highly infectious influenza viruses, which are usually seen in winter and spread among people by droplets (such as coughing, sneezing). The best way to protect yourself is by not contacting the infection or vaccination. The flu vaccine is a non-viable viral vaccine. It is made in chicken egg embryo. It is produced from inactivated influenza viruses. The vaccine stimulates the immune system against the influenza virus, preventing the development of infection or reducing the likelihood of serious illness. Since the protection of the vaccine changes the genetic structure of the influenza virus very often, it decreases in the coming years and needs to be repeated every year. The vaccine, which is re-prepared every year, contains the most likely types (strain) expected to be seen in the community that year. Adults over the age of 65 are recommended to receive a flu shot once a year, even if they have no underlying disease. In contrast, adults between the ages of 20-65 are recommended to have a vaccine once a year if there are some risk factors (such as diabetes, heart or lung disease, kidney failure, immune system diseases). Since the flu is most common in the winter and the effectiveness of the vaccine occurs after 2 weeks, September and October are ideal for getting the flu vaccine. Although vaccinated, there is a possibility of flu. It is very important that occupational groups such as healthcare professionals, babysitters and nursing home workers both protect themselves and are not vaccinated, so that 20% of the world's population suffers from flu. There were 5 major pandemics (epidemics in the world) in the world. In 1918, the Spanish flu caused 25 million deaths. 1957 Asian flu, 1968 Hong Kong flu, Wiscensin virus was common in early 2007. 500 million people get flu every year, 250-500 thousand of them die. About the flu vaccine, the flu vaccine does not cause flu. It is necessary to be vaccinated every year. 70-80% of the flu is prevented. The effect of the vaccine starts within 2-3 weeks Therefore, it should be done at least 2 weeks before the flu epidemic. Vaccine protection is 6–12 months. It can be performed with other vaccines. Flu vaccine must be administered intramuscularly. ChildrenHealthcare staffShould have chronic metabolic disease such as diabetes patients, kidney disease, blood and bone marrow disease, Chronic lung patients, Chronic cardiovascular patients, People with immune system suppression (those with chronic blood disease, cancer patients, organ transplant, HIV infection, using immunosuppressive drugs s) Pregnant women or women planning a pregnancy during the flu season, nursing mothersChild patient caregivers, babysitters and nursing home workersDifficulty with symptoms and symptoms (such as bedridden patients, brain and nervous system disorders) Anyone who wants to be protected from the medical, social and economic adverse effects of flu. Vaccination in children Vaccination in children is routinely recommended. Children can get a flu shot from the age of 6 months. However, not every flu vaccine may be suitable for babies up to 6 months. If children under 9 years of age are to be vaccinated for the first time, two doses should be given at least 4 weeks apart in the first year. If this situation is overlooked in the first year, it should be applied in the next year. If it is not applied again, one dose should be administered in the following years. The vaccination dose in children is half a dose (0.25 ml) under 36 months, and a dose (0.50 ml) from 36 months. To whom the flu vaccine is not administered to children under 6 months. Those who are in the first 3 months of pregnancy. Those who have Guillain-Barre syndrome within 6 weeks after administration should be postponed until the conditions of vaccination of those with moderate or severe acute illness and fever should improve. In the first two days, mild fever, malaise, fatigue, head, joint, muscle pain, sweating may be experienced. Very rarely, an allergic reaction to the vaccine can be seen. Side effects of the flu vaccine pass by itself within 24 - 48 hours. It does not require treatment.