Question about Katadyn Hiker Pro

I have not carried out any laboratory tests, but logically the filter also filters bacteria.
If this were not the case, the filter should not be sold at all. But the tests carried out by numerous users
confirm the effectiveness of the filter. I have never been ill etc. after drinking the filter water.

Unfortunately I got ill. Probably a noro virus. And that was while filtering river water in Switzerland

I haven't used it. This objez is one of the items I keep aside in case of disaster.