The flu vaccine does not contain live virus so it can not give your child the flu.
It is given once a year by injection to the upper outer area of the arm and it takes only seconds. It should not be painful, but some children may be apprehensive about having injections.
Possible mild side effects include pain, swelling and redness at the injection site, also occasionally slight fever, shivering, headache and aching muscles.
These symptoms usually disappear within one to two days without any treatment.