Flu shots for children are generally harmless, but allergic reactions, etc. may occur in a few cases. Influenza vaccine is used to prevent influenza and is generally safe. Even if there are adverse reactions, most of them are mild and generally harmless. However, the influenza vaccine contains foreign proteins, after receiving the influenza vaccine may lead to allergic reactions, such as skin allergies, may also lead to mild fever, but most of them can be relieved on their own, when the allergic reaction is serious, can lead to chest tightness, shock and other phenomena, so the vaccine should be left behind for observation for 30 minutes after the injection. Children are at high risk for influenza, and getting the flu can lead to serious complications such as pneumonia. Vaccination can reduce the incidence of these conditions; and the incidence of serious adverse reactions is very low and generally safe, so they can usually benefit from influenza vaccination.