Hand Hygiene involves not only washing your hands, but also drying them thoroughly.
You can wash your hands really well and remove the problem germs, but if you then walk away with your hands still damp, more germs will attach themselves and your effort will have been wasted. So always remember this simple equation:
Hand hygiene = hand washing + hand drying.
you should do hand hygiene:
1.)before eating
2.)after using the toilet
3.)after covering your own mouth and nose while coughing or sneezing
4.)after using a disposable tissue
5.)when you start and finish work.