Flu inactivated vaccine: what to know

Inactivated means the influenza material in the vaccine cannot reproduce and cause influenza infection. After vaccination, the immune system learns to recognise the included strains. Protection is not immediate and the formulation may be updated for the circulating season. The vaccine does not treat flu that has already started, and it cannot prevent every respiratory illness. An injection-site ache, mild soreness, tiredness, or a brief temperature can occur as the immune system responds.

Tell the vaccinator about previous vaccine reactions, a serious allergy, pregnancy, immune problems, and current medicines. Ask which formulation and timing are suitable for your age and health. After the injection, remain where advised so a staff member can help if an immediate reaction occurs. Keep the arm moving gently and use a cool cloth for local discomfort. Seek advice before vaccination if you are acutely unwell or have questions about an earlier reaction.

Call emergency services for trouble breathing, swelling of the face or throat, widespread hives, collapse, or severe dizziness soon after vaccination. Contact a clinician if a reaction is worsening, unusually severe, or not settling. A sore arm or mild fever can be expected, but ask a pharmacist or doctor which symptom-relief medicine is appropriate for you. Report any suspected serious reaction to the vaccination service so it can be assessed and documented.

Is an inactivated flu vaccine suitable for me? Which formulation should I receive? When should I have it? Does a previous allergy or vaccine reaction change the plan? What should I do if I develop a fever or rash afterward?