Great question — answering as the UphillTech team:
To the first question, my guess is that yes, you have lost some kind of immunity, but the reasons of this lost may not only lay on your habit of avoiding raw food, and tap water, but in the practices of all the Western culture. I do not know how to quote properly, but here it is something I found in an article in the New York Times Magazine (May 15 2013): A handful of microbiologists have begun sounding the alarm about our civilization's unwitting destruction of the human microbiome and its consequences. Important microbial species may have already gone extintc before we have had the chance to learn who they are or what they do. What we think of as an interior wilderness may in fact be...
Full answer by Ariel Alvarez: https://travel.stackexchange.com/a/108423 (CC BY-SA 3.0).
Need it done for your business? UphillTech.
