[\'Public Health Institute Ploen, Schleswig-Holstein, Hamburgerstr.17/18, 24306, Ploen, Germany. josef.weigl@kreis-ploen.de.\', \'Public Health Institute Ploen, Schleswig-Holstein, Hamburgerstr.17/18, 24306, Ploen, Germany.\']
Household quarantine of second degree contacts is an effective non-pharmaceutical intervention to prevent tertiary cases in the current SARS-CoV pandemic.