Serious adverse reactions to the flu vaccine are very rare. About 10% experience swelling, redness or pain at the site of the injection. 10% of children aged six months to three years experience fever.
Side effects or adverse reactions following any immunisation can be reported to the Therapeutic Goods Administration by calling the Adverse Medicine Events Line on 1300 134 237, or lodging a report online at the TGA website via the ‘report a problem link’. You can also report adverse events to your doctor, hospital, health centre or to your state or territory health authority.