Hand sanitizers are almost entirely ineffective against norovirus (or Norwalk) type viruses, the main cause of contagious gastroenteritis. A sufficient amount of hand sanitizer or hand sanitizer should be used to thoroughly wet or cover both hands.
Vieuzi vya mikono vilivyo na alkoholi karibu havifai kabisa dhidi ya virusi aina ya norovirus (au Norwalk), ambavyo ni visababishi vya kawaida zaidi vya ugonjwa wa kuambukizana wa gastroenteritisi.Dawa ya kutosha au kieuzi chenye alkoholi lazima kitumike ipasavyo ili kutia mikono majimaji au kufunika mikono yote.