A Brisbane man has contracted measles, becoming the second person diagnosed on the city's southside in less than a week.
Queensland Health says the adult male was likely infectious when he visited retail stores on Boundary Street in West End and a barber on January 22 and 23.
He also visited the Coles Supermarket in West End on January 25 and the Stradbroke Island barge that night.
Metro South Health public health physician Dr Brad McCall says the entire city should be on measles alert, particularly those who may have come into contact with the man.
His diagnosis comes less than a week after an adult on the city's southside was confirmed as having the infectious disease.
The person was likely infectious when flying from the Philippines to Sydney via Qantas and then to Brisbane on January 21, also visiting the IGA at Carina that day.
Measles symptoms include fever, cough, a runny nose, then a red spotty rash and sore eyes a few days later.
Dr McCall says those with two recorded doses of measles-mumps-rubella (MMR) vaccine are very unlikely to get the disease.
"People who are unsure or have concerns about their immunity to measles should contact their doctor to check whether they have had both vaccines," he said in a statement.