Before revision:  We identified a metastable regime at low case numbers, where test-trace-and-isolate (TTI) together with moderate contact reduction is sufficient to control the spread.
After revision:  We identified a metastable regime at low case numbers, where test-trace-and-isolate policies partially compensate for local spreading events, and only moderate contact restrictions remain necessary. Across wide parameter ranges of our complementary compartmental model, the equilibrium is reached at or below 10 daily new cases per million people. Such low levels had been maintained over months in most European countries.