What should you know about influenza tetra vaccine?

Tetra means four. The vaccine is formulated to stimulate immune recognition of four influenza components selected for the relevant season. Protection develops after vaccination rather than immediately, and circulating viruses can change. You may still catch another respiratory infection or influenza, but vaccination can reduce the chance of serious illness. It cannot cause influenza because it does not contain a live flu virus capable of causing infection.

Tell the vaccinator about previous vaccine reactions, severe allergies, pregnancy, immune problems, and current illness. Ask which product and schedule are suitable for your age and health. After the injection, a sore arm, tiredness, mild fever, headache, or muscle aches may occur and usually settle with supportive care. Remain for the observation period advised by the clinic and follow its instructions about medicines.

Seek emergency help for difficulty breathing, swelling of the face or throat, widespread hives, collapse, or sudden severe dizziness after vaccination. Contact a clinician for a high or persistent fever, unusual symptoms, or an injection-site reaction that is becoming more painful or swollen. A cough, chills, or fatigue after vaccination should be discussed if severe, prolonged, or accompanied by breathing trouble.

Ask whether this vaccine suits you, when protection is expected, which reactions are normal, and how it fits with other vaccines or medicines. Mention any previous allergic reaction before receiving it.