Because contact tracing is complex. The cantons have yet to limit themselves to conventional means: making calls and creating Excel spreadsheets, 24 hours a day, with high personnel costs. With a smartphone app, work should be more efficient from mid-May, but only marginally: calls are often essential.
Lucerne Cantonal Physician Roger Harstall calculates workload using his canton’s example: “If we assume five new cases per day, each of which had closest contact with ten people, the result is almost 100 hours per day”.
Lucerne continues to record more than five new infections every day, so contact tracing is not yet systematic. Harstall is confident: “A resumption is planned for early next week.”