Flublok and Fluzone High-Dose are vaccines indicated for the prevention of disease caused by influenza A and B strains contained in (or in the case of Flublok, represented by antigens contained in) the vaccine. Flublok is given to individuals 9 years of age and older. Fluzone High-Dose is given to people 65 years of age and older.
See why the flu is more dangerous than you may think.
Flu-related complications can be serious.
Flu-related complications can put older adults at greater risk for hospitalization, pneumonia, or heart attack.
The CDC classified the 2025-2026 flu season as a moderate-severity season for people of all ages.
The 2024-25 flu season had the highest flu-related hospitalization rate recorded since the 2010-11 season.
Hospitalizations from Flu
(2024-2025 season)
According to a clinical study of almost 1,300 people 40 years or older, some people were approximately 10 times more likely to experience their first heart attack after having the flu.
⁓10X Increased Risk
of Heart Attack
Fight the flu with Sanofi.
Not all flu vaccines are the same. You do have a choice, so ask for a Sanofi higher-dose flu shot–Fluzone High-Dose and Flublok.
With 4x and 3x more antigen, respectively, than a regular flu shot, they're proven to provide better flu protection than standard-dose flu shots in older adults. They’ve even been shown to better protect against flu-related complications.*
Find your Sanofi higher-dose flu shot for better protection.
Schedule Your Flu Shot Now*See the study results page for full study design of our randomized controlled trials and real-world evidence.
Which Sanofi flu shot is right for me?
| Vaccine | What ages is it approved for? | Does it contain egg? | How does the dose compare to regular dose flu shots? | How much does it cost? |
|---|---|---|---|---|
| Flublok | 9 years of age and up | No, completely egg-free | 3x the dose of a standard flu shot | Free for nearly all patients |
| Fluzone High-Dose | 65 years of age and up | Yes, contains traces of egg | 4x the dose of a standard flu shot | Free for nearly all patients |
| What ages is it approved for? | |
|---|---|
| Flublok | 9 years of age and up |
| Fluzone High-Dose | 65 years of age and up |
| Does it contain egg? | |
| Flublok | No, completely egg-free |
| Fluzone High-Dose | Yes, contains traces of egg |
| How does the dose compare to regular dose flu shots? | |
| Flublok | 3x the dose of a standard flu shot |
| Fluzone High-Dose | 4x the dose of a standard flu shot |
| How much does it cost? | |
| Flublok | Free for nearly all patients |
| Fluzone High-Dose | Free for nearly all patients |
