Soap removes germs from the skin, and studies show that people tend to wash their hands more thoroughly when using soap than with water alone.
Hakika, popo ndio chanzo cha moja kwa moja cha virusi vinavyosababisha ugonjwa kwa binadamu ikiwa ni pamoja na virusi vya kichaa cha mbwa, virusi vya Ebola, virusi vya Nipah na virusi vya Hendra.