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mgb_phys
#16
Apr10-09, 09:20 PM
Sci Advisor
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Quote Quote by im4PC View Post
I would guess that natives were more resistant to microbial contaminants found in drinking water. Therefore, they probably didn't need to purify water.
Not really, you do pick up some antibodies to local nasties form your mothers milk but you don't inherit microbial resistance as such.
Native people probably did suffer from many water borne diseases, just as they do in parts of sub-saharan africa today. But most diseases don't develop into epidemics if the population density is at the village level.
Remember nature doesn't care how many parasites you die with, as long as you managed to reproduce first.