What should you know about flu live attenuated vaccine?

Live attenuated means that the viruses have been weakened so they can stimulate protection but are not expected to cause influenza in people with a normally functioning immune system. The spray is given into the nose, where influenza viruses commonly begin infection. It is different from an injectable flu vaccine, which uses non-live influenza material. Protection is directed at the influenza strains included in that season's vaccine, so vaccination does not prevent every cough, cold, or other respiratory infection.

A blocked or runny nose can affect how the spray is delivered, and mild nasal symptoms may occur afterwards. The exact product, recommended age range, and local programme can vary, so a pharmacist or clinician should confirm whether this option is suitable.

Tell the vaccinator about a severe allergy to a previous flu vaccine or any ingredient, a weakened immune system, pregnancy, regular medicines, or a history of wheezing or asthma. These details can change whether a live nasal vaccine is appropriate or whether an injected alternative should be considered. Do not assume that a family member's eligibility applies to you.

After the spray, follow the advice supplied with the product. Nasal congestion, a runny nose, headache, tiredness, or a mild temperature can happen and usually settle without specific treatment. Keep fluids nearby and avoid giving medicines to a child unless the label or a healthcare professional supports their use. Ask when the next seasonal dose is due, because influenza protection is reviewed as seasons and circulating strains change.

Seek urgent medical help for trouble breathing, swelling of the lips, tongue, or throat, widespread hives, fainting, or sudden severe weakness after vaccination; these may signal a serious allergic reaction. Contact a healthcare professional promptly if a child becomes unusually drowsy, cannot keep fluids down, or is getting worse rather than recovering.

A mild runny nose alone is usually managed with observation, but ask for advice if symptoms are persistent, severe, or confusing the assessment of another illness. People with significant immune suppression should discuss exposure to a live vaccine with their treating team, particularly if close household contact has a severely weakened immune system.

Ask which flu vaccine is recommended for your age and health circumstances, whether nasal congestion could affect today's dose, and what symptoms should prompt a call. You can also ask how the vaccine fits with other planned immunisations and whether medicines or an immune condition change the timing.