Turnbull battling flu on trail

Bleary eyed, runny nose and a hoarse throat - Malcolm Turnbull has come down with the flu in the final stretch of the marathon election campaign.

As he rallied owner-driver truckies in southwest Sydney on Sunday, the prime minister laughed off the sudden illness with a scratchy voice.

"Do you have any flu remedies for me? I'm happy to receive some advice," he joked to reporters.