Internet-delivered Cystic Fibrosis Mental Health Prevention, Wellness, Resource Program: How Does it Work?

The goal of the clinical trial is to test whether a mental health program that is delivered through the Internet works well for children and adolescents with cystic fibrosis (CF) and their healthy siblings. The main questions it aims to answer are: * Does the program improve the mental health such as depression and anxiety symptoms? * Does the program improve overall quality of life? * Does the program improve self-efficacy - an individual's belief in their ability to complete tasks to achieve their goals? Participants will: * Fill out an online survey asking questions about their personal and health information, as well as their mental health before the program * Complete the online mental health program * Fill out an online survey asking questions about their mental health after completing the program, and 1-month and 3-months following completing the program Participants be compared against another group of children with CF and their healthy siblings who are on a waitlist and receiving usual CF treatment. Researchers will compare participants scores before starting the program with their scores immediately following completing the program, 1-month, and 3-month after completing the program. Researchers hope to develop a program that improves mental health, quality of life, self-efficacy, and knowledge about CF.