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I installed a drinking water filter in our kitchen a few months back. The filter manufacturer claims the filter takes out viruses. The filter has a pre-filter to get out the big lumps...a ceramic filter containing silver nitrate, and an activated charcoal filter. Funny, I've never thought of silver as something to kill viruses.
Juan, I think the medicinal use of colloidal silver has been around for quite awhile. Trying to weed through the benefits vs risks is a bit of a challenge though.
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