The use of colloidal silver will not prevent or treat coronavirus (COVID-19) or any disease.
National Centre for Complementary and Integrative Health (NCCIH) states that consumption of Colloidal silver and other complementary products have not been proven safe and never replace conventional medical care. Further, NCCIH states that colloidal silver can cause serious side effects and also cause poor absorption of some drugs, such as certain antibiotics and thyroxine.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.