Before revision:  Across wide parameter ranges of our complementary compartmental model, the equilibriumis reached at or below 10 daily new cases per million people . Such low levels had been maintained over months in most European countries. However, this equilibrium is endangered (i) if contact restrictions are relaxed , or (ii) if case numbers grow too high.
After revision:  Across wide parameter ranges of our complementary compartmental model, the equilibriumis reached at or below 10 daily new cases per million people or less. However, stability is endangered if restrictions are relaxed , or (ii) if case numbers grow too high.