Dr Vicky Sheppeard, Director of Communicable Diseases at NSW Health said that measles is highly contagious among people who are not fully immunised.
"Measles is highly infectious and is spread through coughing and sneezing.
Symptoms can include fever, tiredness, runny nose, cough and sore red eyes which usually last for several days before a red, blotchy rash appears.
Complications can range from an ear infection to pneumonia or swelling of the brain," Dr Sheppeard
advised that anyone who participated in or attended the competition be alert for symptoms of measles.
The time from exposure to the onset of symptoms is typically around 10 days but can be as long as 18 days, so there may be other cases in the community now, or secondary cases could be developing in the contacts of people who attended the event.
Dr Sheppeard advised those who attended the event and have developed symptoms of measles to contact their local public health unit or phone ahead to their local doctor if requiring medical attention.
"If you have symptoms of measles please phone ahead when seeking medical attention to ensure you don't share the waiting area with other patients," Dr Sheppeard