The information from the COVID tracker app is held in anonymised form by the SAIL Databank, at the University of Swansea. The personally identifying information from the COVID tracker app is held separately by SAIL’s Trusted Third Party, the NHS Wales Information Centre (NWIS).
In order to link your survey data, we will transfer your first name, surname, year of birth, sex, postcode, email address, and a unique study ID to NWIS using their secure file upload website.
NWIS will de-identify and encrypt the personal data we send them and assign an Anonymous Linking Field (ALF). NWIS will send the ALF to SAIL, who will then use the ALF together with the unique study id to link your information from the COVID symptoms tracker app into your study information.