Fluzone High-Dose Quadrivalent is an egg-based, high-dose flu shot approved for use in people 65 years of age and older. This vaccine is made with four times the amount of antigen than regular-dose flu shots. The antigen is the part of the vaccine that helps your body build protection against flu viruses. The higher amount of antigen helps to create a stronger immune response, and therefore better protection against the flu.
Who should get the high-dose flu vaccine?
The high-dose flu vaccine is recommended for people 65 years and older, who often have a lower immune response after flu vaccination compared to younger people. Talk to your doctor or pharmacist about which vaccine is best for you.
For PacificSource members, both the high-dose and regular-dose flu vaccines are available at local pharmacies or your doctor’s office. Visit our Flu Prevention webpage for more info.
What should you do if you qualify for the high-dose vaccine, but it is not available?
In addition to the high-dose flu vaccine, two other flu vaccines are preferred for individuals 65 years and older during the 2023-2024 flu season.
Fluad Quadrivalent is an egg-based flu vaccine. This vaccine is made with an adjuvant, which is an ingredient that is added to help create a stronger immune response.
Flublok Quadrivalent does not use flu virus or eggs. Like the high-dose vaccine, this vaccine is made with a higher amount of antigen than regular-dose flu vaccines.
State-specific flu vaccine resources
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Idaho The Idaho Immunization Coalition is a team of parents, community members, and experts who share facts on immunizations to protect Idahoans from preventable disease. |
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Montana The Montana Immunization Program aims to prevent vaccine-preventable disease among Montana residents by sharing information, managing data, providing education, giving guidance, and overseeing the distribution of publicly funded vaccines. |
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Oregon Boost Oregon is a parent-led nonprofit organization that empowers people to make science-based vaccine decisions for themselves and their families.
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Washington The Immunity Community promotes vaccine confidence across the lifespan through community partnerships and educational resources. |
Flu vaccine general information
How long is the flu vaccine good for?
Flu vaccines are recommended once per year, for three reasons:
- Flu vaccine viruses are updated almost every year.
- Even if the viruses do not change between years, annual vaccination is still recommended because immunity decreases after a year.
- Immunity is found to last the entire flu season.
For more information about the flu vaccine, visit:
- CDC.gov/flu/prevent/flushot
- State-specific resources above
Get the seasonal flu vaccine
To find where you can get a flu vaccine in your area:
- Visit Vaccines.gov/find-vaccines
- Call 211
- If you’re a PacificSource member, visit our Flu Prevention webpage