Until now, only injectable vaccines against influenza have been available  Parents are reluctant to subject children to the pain of injections, but adults, who are at risk of serious complications from influenza, are commonly vaccinated  A new influenza vaccine, administered painlessly in a nasal spray, is effective for children
However, since children seldom develop serious complications from influenza, no significant public health benefit would result from widespread vaccination of children using the nasal spray
The nasal spray vaccine is most effective when administered to adults.