The internet-delivered Cognitive Behavioural Therapy Program comprises 6 lessons completed over 7 days. It includes psychoeducation about anxiety and management of its physical symptoms, graded exposure to overcome avoidance, behavioural experiments to test maladaptive beliefs, thought challenging to address unhelpful thoughts, social skills training and relapse prevention. A new lesson will become available each day (with the exception of Day 6, which is devoted to practicing challenging skills