This is due to the oligodynamic effect, and silver is equally potent. https://en.m.wikipedia.org/wiki/Oligodynamic_effect https://en.m.wikipedia.org/wiki/Oligo

This is due to the oligodynamic effect, and silver is equally potent. https://en.m.wikipedia.org/wiki/Oligodynamic_effect https://en.m.wikipedia.org/wiki/Oligodynamic_effect