About influnza virus surface
Quadrivalent inactivated influenza vaccine
Used for
- Prevention of seasonal influenza caused by four influenza virus strains.
Usual adult dose
One 0.5 mL injection into a muscle once each influenza season.
Usual dose in children
Ages 6 months and older: one injection each season; children under 9 years receiving influenza vaccine for the first time may need two doses, at least 4 weeks apart.
Common side effects
- Injection-site pain, redness, or swelling
- Headache or muscle aches
- Tiredness or feeling unwell
- Fever, especially in children
Important warnings
- Do not use after a severe allergic reaction to a previous dose or vaccine ingredient.
- Tell the vaccinator about severe egg allergy or a history of Guillain–Barré syndrome.
- Vaccination may be delayed during a significant febrile illness.
- It does not prevent influenza caused by strains not included in the vaccine.
Pregnancy
Inactivated influenza vaccines can be used during pregnancy; vaccination is recommended in many public-health guidelines.
Breastfeeding
Compatible with breastfeeding.
Interactions
- Tell the vaccinator about medicines that weaken the immune system.
- Other vaccines may be given at the same visit, at separate injection sites.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.