Measles, polio detected as authorities urge caution

Travellers are urged to be on alert after measles cases were detected at Melbourne airport. (Joel Carrett/AAP PHOTOS)

Travellers are being warned to monitor for symptoms after a new case of measles was detected after a person was exposed to the disease on an international flight.

The contracted case was reported in Victoria after the person was exposed while on VietJet Air flight VJ083 which arrived in Brisbane on December 4, Victoria's Acting Chief Health Officer Christian McGrath said.