If you went to the Broncos last week, or had a drink in any one of six Brisbane bars and cafes, you may have been exposed to measles.

Doctors are now bracing for a rash of measles cases developing over the next few weeks.

A typical measles rash.

Queensland Health has warned a male patient, whose age had not been released, was infectious when he visited a number of public places around the city.

It says people who may have came in contact with the person need to be alert for symptoms.