*Fluzone High-Dose and Flublok contain 4x and 3x the antigen content of a standard-dose influenza vaccine, respectively.1-4
†Fluzone High-Dose and Flublok are the only higher-dose flu vaccines proven to prevent more flu in older adults than a standard-dose influenza vaccine in randomized controlled trials.3,4,7
‡In a randomized controlled trial, Fluzone High-Dose trivalent formulation provided 24% (95% CI: 10-37) better protection against influenza due to any lab-confirmed circulating strains vs a standard-dose influenza vaccine in adults 65 years of age and older.2,3
Solicited injection-site reactions and systemic adverse reactions were more frequent after vaccination with Fluzone High-Dose compared to Fluzone.2
Click here for additional efficacy and safety data for Fluzone High-Dose.
§In a randomized controlled trial, Flublok (quadrivalent) provided 30% (95% CI: 10-47) better protection against influenza due to any PCR-confirmed circulating strains vs a standard-dose quadrivalent inactivated influenza vaccine in adults 50 years of age and older.1,4
The efficacy of the quadrivalent formulation is relevant to Flublok since both vaccines are manufactured according to the same process and have overlapping compositions.1
For Flublok, in children and adolescents 9 through 17 years of age who received Flublok Quadrivalent, the most common (≥10%) solicited injection-site adverse reaction was pain (34.4%). The most common (≥10%) solicited systemic adverse reactions were myalgia (19.3%), headache (18.5%) and malaise (16.1%). In adults 18 through 49 years of age who received Flublok, the most common (≥10%) injection-site adverse reaction was pain (37%); the most common (≥10%) solicited systemic adverse reactions were headache (15%), fatigue (15%) and muscle pain (11%). In adults 50 through 64 years of age who received Flublok, the most common (≥10%) injection site adverse reaction was pain (32%); the most common (≥10%) solicited systemic adverse reactions were headache (17%), fatigue (13%), and muscle pain (11%). In adults 65 years of age and older who received Flublok, the most common (≥10%) injection site adverse reaction was pain (19%); the most common (≥10%) solicited systemic adverse reactions were fatigue (13%) and headache (10%).1
Click here for additional efficacy and safety data for Flublok.
CI=confidence interval; PCR=polymerase chain reaction.

These vaccines and their administration are covered by Medicare and most commercial insurers.
The information above is available at CMS.gov. The information is provided for informational purposes only and is not a guarantee of coverage. The information is gathered from various resources and is subject to change.
Important Safety Information
References: 1. Flublok. Prescribing Information. Protein Sciences Corporation. 2. Fluzone High-Dose. Prescribing Information. Sanofi Pasteur Inc. 3. DiazGranados CA, et al. N Engl J Med. 2014;371(7):635-645. doi:10.1056/NEJMoa1315727 4. Dunkle LM, Izikson R, Patriarca P, et al; PSC12 Study Team. N Engl J Med. 2017;376(25):2427-2436. doi:10.1056/NEJMoa1608862 5. Zimmerman RK, Nowalk MP, Dauer K, et al. Vaccine. 2023;41:5134-5140. 6. Lee JKH, et al. Vaccine X. 2023;14:100327. doi:10.1016/j.jvacx.2023.100327 7. Grohskopf LA, et al. MMWR Recomm Rep. 2024;73(5):1-25. doi:10.15585/mmwr.rr7305a1