Sometimes, people think that washing hand after eat in restaurant is the last step to clean the hand. People disregard that toilet doorknob contains a lot of bacterial that come from people who don't do washing hand. For example, male usually hold their "thing" while urinating and if they don't wash their hand it becomes a big problem. When they go outside, the doorknob will be touched, and there will be a bacterial transfer.
How this thing can be solved? You need a piece of re-used paper or something else, then use it to cover your hand then open the door. Keep your hand clean! Thanks
