The measles outbreak in Queensland has expanded, with health officials confirming that a fourth person with the virus attended a Jelly Roll concert.

The Metro South Public Health Unit reported that this individual was unaware of their infection when they attended the American rapper’s performance at the Brisbane Entertainment Centre on October 24.

Following the concert, the infected individual visited the Mustang Brothers Football Club on November 8, Mullein Pharmacy Hillcrest on November 12, and the Logan Hospital Emergency Department on both November 12 and 14.

Additionally, three other concert attendees who contracted the virus were reported to have been in the Gold Coast, Brisbane, and Wide Bay regions.

Health authorities are actively conducting contact tracing and will inform anyone who might have been exposed. They also advise those who visited these locations to remain vigilant for symptoms.

This alert is issued shortly after a Queensland resident, unknowingly carrying measles, traveled to Sydney and visited several places.

They attended the Oasis concert at ACCOR Stadium on November 8, as well as the Sydney Airport, CBD, Inner West and trains on November 8 and 10.

NSW Health has consequently also issued a measles alert.

“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,” Health Protection NSW Executive Director Dr Jeremy McAnulty said.

Tens of thousands are estimated to have attended the Jelly Roll and Oasis concerts.

Measles, a highly contagious infection that can lead to a red spotty rash, fever, cough, runny nose and sore eyes, can begin to present itself between 10 to 18 days from the time of contact.

Anyone who believes they may be infected should avoid public spaces and get tested. 

NSW and Queensland health authorities are using the recent cases of measles to remind the public, particularly children and those aged 60 or under, to ensure they are vaccinated against the preventable disease.