Residents have been warned to be on the lookout for measles after an infected baby boy visited a major shopping centre north of Brisbane and spent hours at the city's children’s hospital emergency department.

Anyone who visited the affected areas was urged to check their immunity to the highly infectious disease.

The Metro North Public Health Unit has confirmed a measles case in a baby boy.

The child visited Runcorn Plaza Family Medical Practice in Brisbane’s south about 11.30am last Tuesday, February 27.

On Thursday last week, he went to Westfield North Lakes Shopping Centre between about 7.30am and 8.30pm, during the busy late-night shopping period.