Evaluation of a Recombinant Quadrivalent Influenza Vaccine Versus a Marketed Quadrivalent Inactivated Influenza Vaccine in Children 3 to 17.

Eligible subjects will be randomized, 1:1, to receive one or two doses of same vaccine. Subjects will be categorized in two age groups: subjects 9 to 17 years will be allocated in Group A and will receive one dose; Subjects 3 to 8 will be allocated to group B and the ACIP/CDC algorithm will be applied to determine should one or two doses will be applied 28 days apart. Vaccinator will be non blind and will not participate in the clinical evaluation.

Eligible subjects will be randomized, 1:1, to receive one or two doses of same vaccine. Subjects will be categorized in two age groups: subjects 9 to 17 years will be allocated in Group A and will receive one dose; Subjects 3 to 8 will be allocated to group B and the ACIP/CDC algorithm will be applied to determine should one or two doses will be applied 28 days apart. Vaccinator will be non blind and will not participate in the clinical evaluation.