NSW Health said the person arrived at Sydney International Airport last Saturday after returning from India, where there have been ongoing measles outbreaks.
They then travelled to Canberra on a Murrays bus express service.
While health authorities said therewas no ongoing risk to the public at the locations the person visited while infectious, they have encouraged the public to be on the lookout for symptoms if they had been at:
- Air India flight AI 302 from Delhi to Sydney, arriving in Sydney on Saturday 20 January at 8.10am
- Sydney Airport, Terminal 1 International Arrivals (including baggage claim and customs) and Bay 9, bus and coach bays, on the morning of Saturday 20 January
- Murrays Bus Sydney to Canberra Express, departing Sydney International Airport around 10.30am on Saturday 20 January. ACT Health is contacting individuals who travelled on this bus service.
"Symptoms of measles include fever, runny nose, sore eyes and a cough, usually followed three or four days later by a red, blotchy rash that spreads from the head to the rest of the body," Dr Christine Selvey, the director of communicable diseases branch at NSW Health, said.
"Symptoms may appear between seven and 18 days after an exposure, so it's important for people to stay vigilant if they've been exposed, and if they develop symptoms, to please call ahead to their GP or emergency department to ensure they do not spend time in the waiting room with other patients.
"This should be a reminder for everyone to check that they are protected against measles, which is very infectious.
"Anyone born during or after 1966 needs to ensure they have received two doses of measles vaccine, this is particularly important prior to overseas travel, as measles outbreaks are occurring in several regions of the world at the moment."
ACT Health is contacting other passengers who had been on board the bus to Canberra.