I do not know if you understand exactly WHO we can thank for the sudden appearance of all these tiny, inexpensive filters.
It is the kidney dialysis industry!
Dialysis technology has been transferred to the water purification process and due to the research into cheap, disposable filters for removal of impurities from the blood we now have a multitude of options for water purification.
I am partial to the Sawyer products due to their wide selection of units for all uses at reasonable prices. I have sent several missionaries into the field with the Sawyer Mini and at least one of them came home and purchased a large family size unit and sent it back to Tanzania for use by his host family. The bigger units have even better filters than the backpacking models.
It is estimated that 80% of the deaths world wide are due to lack of pure water.
That sort of means that you never develop an "immunity" to the bad water or that would not be the case.
What does not kill you does not necessarily make you stronger, its just killing you so slowly you don't notice it.
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