What should you know about fluzone quadrivalent influenza vaccine?

Fluzone Quadrivalent is made with virus components that cannot cause influenza. After vaccination, the immune system develops a response to the included strains. Protection is not immediate and the match with circulating viruses can vary, so vaccination does not prevent every respiratory illness. The formulation belongs to the [Inactivated Vaccine](/materials/inactivated-vaccine/) group.

Tell the vaccinator about previous vaccine reactions, current illness, allergies and any condition or medicine that affects your immune system. Remain at the clinic for the observation period they recommend. A sore arm, mild tiredness or a low-grade temperature can occur and generally settles with simple care. Do not take the vaccine if you have previously had a serious allergic reaction to a relevant ingredient or dose without discussing it with a clinician first.

Seek emergency help for trouble breathing, swelling of the face or throat, widespread hives, collapse or sudden severe weakness after vaccination. Contact a clinician if symptoms are severe, worsening or unusual rather than following the expected local reaction. A vaccine cannot treat influenza that is already causing symptoms, so seek advice if you develop significant breathing difficulty or become acutely unwell.

Ask which seasonal formulation is available, when vaccination is appropriate if you are unwell, whether you need another dose for your age or health circumstances, and which reactions should be reported. Check how vaccination fits with your other medicines and previous immunisations.