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Flucelvax PF Quadrivalent 2021-2022 (injection)

Generic name: influenza virus vaccine (injection)

Brand names: Afluria PF Pediatric Quadrivalent 2021-2022 injection, Afluria PF Quadrivalent 2021-2022 injection, Afluria PF Quadrivalent 2022-2023 injection, Afluria Quadrivalent 2021-2022 injection, Afluria Quadrivalent 2022-2023 injection, Fluad Quadrivalent PF 2022-2023 injection, Fluarix PF Quadrivalent 2021-2022 injection, Fluarix PF Quadrivalent 2022-2023 injection, Flublok Quadrivalent 2021-2022 injection, Flublok Quadrivalent 2022-2023 injection, Flucelvax PF Quadrivalent 2021-2022 injection, Flucelv

Last updated November 2, 2026 0 views
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What is Flucelvax PF Quadrivalent 2021-2022?

Influenza virus ("the flu") is a contagious illness caused by a virus that spreads from person to person through the air or by touching surfaces. Symptoms of the flu include fever, chills, tiredness, aches, sore throat, cough, vomiting, and diarrhea. The flu can also lead to sinus infections, ear infections, bronchitis, or serious problems like pneumonia.

Flucelvax PF Quadrivalent 2021-2022 is used for adults and children to prevent infection caused by the influenza virus. This vaccine helps your body build immunity to the disease, but it will not treat an active infection you may already have.

This medication guide only covers the injection form of this vaccine.

Like any vaccine, Flucelvax PF Quadrivalent 2021-2022 may not protect every person from the disease.

This section was rewritten for readability and reviewed for meaning.

Warnings

Flucelvax PF Quadrivalent 2021-2022 will not make you sick with the flu virus.

Getting infected with the influenza virus may pose a greater risk to your health than getting this vaccine.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You may not be able to receive this vaccine if you have ever had a severe allergic reaction to a flu vaccine or any of its ingredients.

Tell your vaccination provider if you are allergic to eggs. Some flu vaccines contain egg protein.

Tell your vaccination provider if you have:

  • fever;
  • fainted after receiving an injection;
  • a weak immune system (caused by disease or by using certain medicine); or
  • a history of Guillain-Barre syndrome (within 6 weeks after receiving a flu vaccine).

Tell your vaccination provider if you are pregnant, plan to become pregnant, or are breastfeeding.

This section was rewritten for readability and reviewed for meaning.

This vaccine side effects

Get emergency medical help if you have signs of an allergic reaction: hives, trouble breathing, swelling of your face, lips, tongue, or throat.

Some children aged 6 months to 4 years may have a higher risk of having a seizure caused by fever on the first day after vaccination. Tell your vaccination provider if your child has ever had a seizure. Call your doctor right away if your child has a seizure.

Keep track of any side effects you experience. If you get this vaccine again in the future, you may need to inform the vaccination provider if the previous shot caused any side effects.

Flucelvax PF Quadrivalent 2021-2022 will not make you sick with the flu virus. You might have flu-like symptoms during flu season that may be caused by other strains of the influenza virus.

Getting infected with the influenza virus may be more harmful to your health than receiving this vaccine. However, like any medicine, this vaccine can cause side effects, but the risk of serious side effects is very low.

Flucelvax PF Quadrivalent 2021-2022 may cause serious side effects. Call your doctor immediately if you have:

  • a light-headed feeling, as if you might faint; or
  • nervous system issues—numbness, pain, tingling, weakness, burning or prickly sensations, vision or hearing problems, trouble breathing.

Common side effects of Flucelvax PF Quadrivalent 2021-2022 may include:

  • pain, redness, tenderness, swelling, bruising, itching, or a hard lump where the shot was given;
  • diarrhea, loss of appetite;
  • muscle or joint pain;
  • fever;
  • headache, tiredness, general feeling of being unwell; or
  • fussiness, crying, or drowsiness in a child.

This is not a complete list of side effects, and others may occur. Call your doctor for medical advice about side effects. You can report vaccine side effects to the US Department of Health and Human Services at 1-800-822-7967.

This section was rewritten for readability and reviewed for meaning.

How is this vaccine given?

Read all vaccine information sheets provided to you.

Follow your doctor's instructions or the schedule recommended by your local health department.

Your vaccination provider, pharmacist, or doctor can recommend the best Flucelvax PF Quadrivalent 2021-2022 for your age.

This vaccine is given as an injection (shot) into a muscle.

Children 6 months through 8 years of age may need 2 doses during the same flu season, given at least 4 weeks apart.

Since the Flucelvax PF Quadrivalent 2021-2022 is redeveloped each year for specific strains of influenza, you should receive a flu vaccine every year.

What happens if I miss a dose?

Be sure to get all recommended doses of this vaccine or you may not be fully protected against disease.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

An overdose of this vaccine is not likely to happen.

Follow your vaccination provider's instructions about any limits on food, drinks, or activities.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect this vaccine?

Before getting this vaccine, inform your vaccination provider about all other vaccines you have received.

Other medications may impact Flucelvax PF Quadrivalent 2021-2022, including prescription and over-the-counter medicines, vitamins, and herbal products. Inform your doctor about all other medicines you are using.

This section was rewritten for readability and reviewed for meaning.

Common questions about Flucelvax Preservative-Free Quadrivalent

How and where is a flu shot injection given?
The flu shot is usually given into the upper arm muscle in people 3 years and older. For infants and young children, the preferred injection site is the front, outer thigh. The CDC recommends a flu vaccine every year for everyone 6 months and older, ideally in September or October before flu activity increases. Continue reading
Flu Vaccines and Egg Allergy: Which Are Safe?
People with an egg allergy can receive any age-appropriate flu vaccine, including egg-based vaccines. CDC does not recommend extra safety measures solely for egg allergy. For 2026–2027, non-egg-based options include Flublok for ages 9 and older, Flucelvax for ages 6 months and older, and mFLUSIVA, an mRNA flu vaccine for adults 50 and older. Continue reading
Which flu vaccines are available this year?
Flu vaccines for 2026–2027 are trivalent, with all 3 virus components updated. New mFLUSIVA is the first FDA-approved mRNA flu vaccine for adults 50 and older, with accelerated approval for ages 65 and older. Fluzone High-Dose, Fluad and Flublok are options for ages 65+, while FluMist nasal spray can be given at home by prescription. Continue reading
Where Can I Get a Flu Shot Near Me?
Flu vaccines are widely available at pharmacies, healthcare clinics and doctors’ offices, although availability varies by location. Many pharmacies offer walk-in vaccination, but you may want to call first to check availability. For most people in the U.S., September and October are the best months to get vaccinated, but vaccination can continue while flu viruses are circulating. Continue reading
How well does the flu vaccine work?
Flu vaccination typically reduces the risk of flu illness by between 40% and 60% during seasons when the flu viruses are well-matched to the flu vaccine. But if you are infected with the virus, the vaccine reduces your chances of getting the flu and passing it on to others and lessens the severity of symptoms, hospitalizations and death. Continue reading
How can I get a flu vaccine without a needle?
You can get a flu vaccine without a needle. FluMist is a nasal spray for eligible people ages 2 through 49 and can be given at home, but requires a prescription. Adults ages 18 through 64 may receive Afluria using the Stratis needle-free jet injector, where available, instead of a needle. Continue reading
What is the difference between Flublok and Flublok Quadrivalent?
Flublok Quadrivalent flu vaccine is no longer manufactured, but Flublok is available for the 2026-2027 flu season. Flublok is a trivalent, egg-free recombinant vaccine that protects against 3 influenza viruses. It is approved for people ages 9 years and older and is made without eggs or influenza virus. Common side effects include injection-site pain, headache, fatigue, and muscle pain. Continue reading

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Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.