Existing customers are individuals who have been genotyped by 23andMe prior to joining the study, and we welcome them to complete the Rare Disease survey. There is no need to complete the study enrollment process; you can get started now by taking the survey here: Rare Disease Survey link. However, please know that the product experience will not change as a result of an existing customer's participation in a study. For example, if an existing customer purchased the Ancestry + Traits Service, they will not gain access to the Health + Ancestry Service without purchasing an upgrade.