<diacritize> According to the Institute of Environmental Medicine and Hospital Hygiene at Freiburg University , Germany , antibacterial additives in some household products may be useless or even dangerous , reports the German newspaper Westfalische Nachrichten . <yor>According to the Institute of Environmental Medicine and Hospital Hygiene at Freiburg University , Germany , antibacterial additives in some household products may be useless or even dangerous , reports the German newspaper Westfälische Nachrichten . 