The individual visited Fresh & Hot Restaurant in Wally Creek and several medical facilities in Campbelltown and Gregory Hills between Sunday 22nd February and Wednesday 25th February.
Many of the state’s exposure sites are concentrated around Sydney’s CBD and Inner West, as well as parts of the North Shore and Western Sydney.
NSW Health said: “This person has no known contact with other measles cases.”
“Measles is now likely circulating in the community and others may be unknowingly exposed to measles.”
People who were at these exposure sites are being told to monitor their symptoms until March 15, as symptoms can take up to 18 days to appear.
“Symptoms to look out for include fever, sore eyes, runny nose and cough, followed by a red patchy rash that usually appears three to four days later and spreads from the head and face to other parts of the body,” Dr Stephen Conaty from the South West Sydney Local Health District said.
“Anyone who has early symptoms and develops a rash a few days later should consider the possibility of measles and get tested, even if they have not attended the identified location.”