Yes it is very important as a first step before coming to call us 2 business days prior your test on 02 8405 7555 to confirm your appointment and to confirm that you feel well to attend the test and not having any recent signs of cold, flu or blocked nose. Failure to confirm may result in cancellation of your appointment. If you have any symptoms of cold, flu, blocked nose or any other medical condition that can affect the test results please call us to discuss and possibly reschedule your appointment.