How does the Katadyn ceramic retain viruses?
Due to their tiny size, viruses can theoretically not be removed with a 0.2 micron (or any physical) filter. Nevertheless, long-term experience in the field has indicated that Katadyn Filters can retain viruses. This surprising fact can be explained: Viruses have an electrical surface charge that attaches them to other particles or materials. Therefore, the tight pore-structure of the Katadyn Filters removes the viruses attached to particles from your drinking water.
