Hello, While I have never tried oil of oregano, I have used colloidal silver many times. Colloidal silver does work very much so. I will put a post up about that and related soon!
Colloidal silver is a very strong fungicide, safe antibiotic and anti viral. Can heal problems from malignant microorganisms such as HIV, herpes and even Ebola. This is something that is controversial especially to the mainstream masses and path of healing. Healthy people and cures are not profitable.
Colloidal silver works on a nano level that attacks bacterium and virus' by penetrating their membrane and stoping its sort of cellular function from what have read. I have used colloidal silver for infections and topically. My sister's friend recently had a Urinary tract infection and an STD which I won't go further into, but, I gave her some of the silver solution that I had on hand. Within 3 days she started feeling better. Of course, even after feeling better its best to keep taking it to ensure the infection is fully healed.
Colloidal silver is my go to product for all infections that might come about.