should a 2 year old have a flue injection
1 The nasal spray flu vaccine can be given to children 2 years and older. 2  It's recommended for healthy children ages 2 through 8 years. 3  If the nasal spray isn't immediately available, the flu shot should be used.4  Side effects of the nasal spray might include runny nose, cough, fever, wheezing, headache and muscle aches. If your child has had the flu vaccine before â or your child gets the flu vaccine for the first time at 9 or older â one dose is enough. 2  Timing is still important, though. 3  It takes up to two weeks after vaccination for a child to be fully protected from the flu.