The Department of Health and Human Services has issued a measles warning for passengers on an international flight to Melbourne.
This concerns the Kuala Lumpur to Melbourne AirAsia flight D7241 arriving at Tullamarine on Wednesday at 9.30am.
An Australian man in his 40s was unwell on the flight and was taken straight to hospital where the illness was diagnosed.
"We are working with airline officials to identify and contact passengers who shared the international flight to Melbourne," Deputy Chief Health Officer Dr Brett Sutton said.
"People who were at Melbourne airport last Wednesday, particularly around the international baggage collection area, who develop illness over the next week should alert their doctor or hospital emergency department."
Symptoms of measles typically include common cold symptoms, such as a runny nose, cough and red eyes.
This is then followed by a fever and rash.
"The characteristic measles rash usually begins three to seven days after the first symptoms, generally starting on the face and then spreading to the rest of the body," Dr Sutton said.
"Anyone developing symptoms is advised to ring ahead to their general practitioner or hospital first and tell them that they have measles so that appropriate steps can be taken to avoid contact with other patients."