I read that the more sterile environment that a child is raised in, the more health problems they will have later on in life when they are exposed to everyday germs - not enough immunities built up in the system from early age.
i.e. people that were born and raised out in the country have less allergies to airborne pollen than people that were born and raised in large cities.
Maybe there IS some truth to the saying "What doesn't kill you makes you stronger"
