Recruitment for the ABC Study began in October 2014 and closed in June 2018, with over 80,000 Australian adults registering online. Data collection ran from October 2014 until the end of 2018, with over 51,500 participants having completed the questionnaire and saliva sample. Some participants were invited to also provide a blood sample and over 10,000 blood samples were collected between June 2015 and August 2018.

Read more about what was collected.