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Q&A What micron level is needed to properly filter viruses from water?

While viruses are not commonly encountered in the great outdoors there is no doubt that many areas of the world that we travel, or live within, that are contaminated with viruses (hepatitis A, noro...

1 answer  ·  posted 9y ago by Abela‭  ·  last activity 7y ago by System‭

Question water-purification drinking-water