The UNICEF, World Bank and a few other organizations have founded an initiative to encourage handwashing WITH soap especially at some critical moments. To encourage this, they have declared today (Oct 15) as global handwashing day.
The critical moments when hands must be washed with soap are:
Here are some more interesting Q&A from their website
Why isn’t it enough to wash with water alone?
Washing hands with water alone, a more common practice, is significantly less effective than washing hands with soap. Using soap adds to the time spent washing, breaks down the grease and dirt that carry most germs by facilitating the
rubbing and friction that dislodge them and leaves hands smelling pleasant. The
clean smell and feeling that soap creates is an incentive for its use.
Is antibacterial soap better at stopping the spread of disease than regular soap?
With proper use, all soaps are equally effective at rinsing away the germs that cause diarrheal disease and respiratory infections.
Their website is at http://www.globalhandwashingday.org/