>We live too sterile. The soaps and cleaners are too strong. In my understanding most cleaners kill a lot of pathogens, but not all; thus, biologically selectivity breeding stronger, more resilient pathogens. I believe bleach in proper concentration kills them all. >Look at mexico where the water sucks but the locals can drink it. I wonder if foreigners get sick when they come to the us, from unfamiliar pathogens?