Brisbane residents need to be on alert for measles symptoms after an infectious patient visited a busy shopping centre, authorities say.

The state's chief health officer Dr Jeannette Young says a Victorian patient visited Fairfield Shopping Centre, a restaurant in Sunnybank and Brisbane domestic airport between July 27 and 31.

Large numbers of people have potentially been exposed, Dr Young says, and further measles cases could present in Brisbane or anywhere in Queensland over the next few weeks.

Queensland Health staff are contacting people known to have been in close contact with the patient.

"It can be a severe illness even in otherwise healthy adolescents and young adults," Dr Young said in a statement.

"Anyone who develops measles-like symptoms within the next week or two should contact their GP for advice."

It is very important to call the medical practice first to say you could have measles, so that staff can take precautions to avoid spreading the disease to others.

She said people vaccinated with two recorded doses of Measles Mumps Rubella (MMR) vaccine were very unlikely to get the disease.

Measles begins with symptoms such as fever, tiredness, cough, runny nose and/or red inflamed eyes. This is followed by a blotchy, dark red rash usually beginning at the hairline, which spreads over the entire body over the next 24 to 48 hours.