Influenza vaccine is a vaccine to prevent influenza, it is a self-funded vaccination, influenza vaccination can be effective in preventing and controlling influenza, the best time to get vaccinated for influenza is at the beginning of the flu season every year, so it is generally recommended to get vaccinated for influenza in October or so, when the influenza vaccine, small children may have a fever. The fever may be caused by the vaccination, usually within 24 hours. The principle of fever reduction is to drink more water, more rest, when the baby’s temperature exceeds 38.5 degrees above, give the baby to eat antipyretic medicine, ibuprofen suspension, for small babies can use Tylenol. 38.5 degrees below the time of physical cooling can be, drink more water, you can use a warm towel to wipe the forehead, neck, armpits and groin. You can also apply antipyretic patches if necessary. Fever caused after vaccination may last for 24-48 hours. Parents only need to treat the symptoms, no special medication is needed.