What should you know about influenza vaccin?

The vaccine presents the immune system with influenza material so it can build a response without causing influenza illness. Protection is not immediate and may vary as circulating viruses change. Vaccination also does not prevent every cough or fever, because other infections can cause similar symptoms.

A sore arm, mild fever, headache, or tiredness can occur after vaccination and usually settles as the immune response develops. A person who has previously had influenza may still benefit from vaccination because future circulating strains can differ.

Tell the vaccinator about previous vaccine reactions, allergies, current illness, pregnancy, and medicines that affect your immune system. Follow the local schedule advised for your age and health needs. After vaccination, keep the record and ask how to manage expected soreness. Continue hand hygiene and ventilation because vaccination does not replace infection-control measures.

Get urgent help for breathing difficulty, swelling of the face or throat, widespread hives, fainting, or severe dizziness after vaccination. Contact a clinician for a persistent high fever, worsening illness, or symptoms that concern you. Mild arm soreness alone is usually managed with simple comfort measures.

Ask which influenza vaccine is suitable, when it should be given, whether you need a seasonal dose, and what to do if you are unwell on the planned day. Discuss any past reaction before receiving another dose.