Photo: © 2010 AP via AAP/Matilde Campodonico
The warning comes after a recent spike in hospital admissions in Western Australia of children suffering from fevers and convulsions after receiving the jab.
The state's chief health officer, Tarun Weeramanthri, says the exact cause of the problem is still under investigation, but says a bad batch of the vaccine could be to blame.
"The clinicians are actually uncertain about the exact nature of whether that caused what happened later," he told the ABC.
"What we do know is that they did have the influenza vaccine in the 12 hours prior to them becoming sick."
