I think at least 10ppm or higher. Dee -------Original Message------- From: Dianne France Date: 28/04/2009 23:23:27 To: silver-list Subject: CS>PPM If we have this swine flu go pandemic what strength of silver should we be using to combat the virus? I had the flu over the winter and was using 5PPM and it didn't seem to help. Dianne
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