Humans have been using colloidal silver for somewhere between 2 and 3 THOUSAND years. There has not been even one reported death using colloidal silver in all of that time. Before antibiotics arrived, colloidal silver was the “standard treatment” for all pathogenic diseases.
The technology to manufacture colloidal silver safely has given birth to a whole new era of disease prevention and mitigation. Colloidal silver is safe. There is no evidence that colloidal silver can harm or kill humans and there is much scientific evidence that colloidal silver is absolutely fatal to pathogens.