TABLE 2.

CovidCodes received and uploaded by cases who are app users (data from the Zurich SARS-CoV-2 Cohort Study: 2020–2021, Switzerland).

Variable	N = 243*
Received CovidCode	224/243 (92.2%)
Uploaded CovidCode	215/224 (96.0%)
Reasons for not uploading the CovidCode
Did not work/Code invalid	3/8 (37.5%)
Received the code too late/Had already informed their contacts	2/8 (25.0%)
Believed data has already been deleted	1/8 (12.5%)
Close contacts already in quarantine	1/8 (12.5%)
Not yet received	1/8 (12.5%)
(Missing)	1

^*Includes data from 42 converted cases.