Before revision: While containment policies of the Covid-19 epidemic have been applied in different countries, a comparative quantitative measure of the efficiency of these policies is not available .
After revision: While containment policies of the Covid-19 epidemic of the novel coronavirus (severe acute respiratory syndrome SARS - CoV-2) has been spreading around the world. While different containment policies using non-pharmaceutical interventions have been applied in different countries, a comparative quantitative measure of the efficiency of these policies is not available .