Sydney, June 20 -- A health alert for measles has been issued for Sydney after a confirmed case traveled through the city's international airport while infectious.

The health department in the state of New South Wales (NSW) said on Friday that the confirmed case arrived in Sydney from Southeast Asia, where there are ongoing outbreaks of measles in several countries, on Monday.

Anyone who was on board Vietnam Airlines flight VN773 that arrived at the Sydney International Airport on Monday or who was in the airport's arrivals and baggage collection areas between 8:00-9:30 a.m. on the same day has been advised to monitor for symptoms of measles.

Mitchell Smith, the acting director of Public Health for the South Western Sydney Local Healt...