Is one of the enhanced vaccines (FLUZONE® High-Dose Quadrivalent and FLUAD®) recommended over the other for adults 65 years of age and older?
No. There is not enough evidence to show that one of these enhanced vaccines is better than the other. Either of the enhanced vaccines (FLUZONE® HIGH-DOSE QUADRIVALENT and FLUAD®) are recommended for adults 65 years of age and older.
Randomized control trials and observational studies...