The two biggest causes of childhood mortality in the developing world today are diarrheal disease and respiratory tract infections. The simple act of washing hands with soap can reduce diarrhoeal risk by almost half, and respiratory tract infection by a third.  Hand washing interrupts the transmission of disease agents and so can significantly reduce diarrhoea and respiratory infections, as well as skin infections. Hand washing with soap should be a universal act. Hand washing with soap is an essential do-it-yourself…