The flight in question, QF748, touched down in Sydney at 10:30 p.m., prompting a warning for those present in the domestic arrivals area of Terminal 3 around 11 p.m. to be vigilant for symptoms.

The individual with the infection was also present at Concord Repatriation General Hospital’s Emergency Department from 1:00 p.m. to 4:10 p.m. on Saturday, authorities have confirmed.

Passengers from the flight are advised to stay alert for any symptoms until January 16, while those at the hospital during the same period should do so until January 21.

Dr. Conrad Moreira cautioned that symptoms to be aware of include fever, sore eyes, a runny nose, and a cough, typically followed by a red, blotchy rash that first appears on the head and face before spreading across the body.

Dr. Moreira also noted that symptoms might not surface until up to 18 days after exposure.

“The measles vaccine can prevent the disease even after exposure, if given early enough,” he said.