Hi Hans

Thanks for your quick response – we have used some of the information you have provided here to perhaps better explain virus filtration! Love the DIY rescue kit solutions too.

Alex

very nice article. I will ad the simple version(not brand related)as a surplus. Bacteria and protozoa can be filtered out with any 2 micron filter. since viruses can not live on there own, they need a living host. the smallest living host is bacteria. so viruses get filterd out to with their host. this is when manufacturers say: viruskill 99,99%. to get 100% you need chemical treatment of any kind(eg. chlorine). lifetime and speed of a filter is depended of filter surface. to clear out chemical pollution you need active coal prefilter. preferred in areas with a lot of industrialized agriculture(fertilizers).
for the DIY rescue kits; only to be done in case of…

– some dieselfilters for cars or truck are 2micron and can be used as waterfilter( a new one of course).
-viruskill with chloor from the department store. a few drops in a bucket(exact dose is to be found on the internet.
-use charcoal as a reactant for getting out chemicals. let your water run true crushed coal, then filter.

good luck on y’r trip and enjoy the ride.

hans