It's logic really. our ancestors didn't used to have antiseptics and all those hygienic stuff.. and they're ok, rite?
Well, the life expectancy for most people a hundred years ago was lower than now. This is because they didn't have all the medical and technical advances we do now.
But about vaccinations... aren't they sorta like forced immunities... I don't see how they can cause allergies.
But yeah it makes sense that anti-bacterial stuff and the practice of purifying air can.
I thought this was already scientifically proven, but I guess I just assumed it was.
I never believed in the use of anti-bacterial lotion or what not(though I do use anti-bacterial hand soap since they're everywhere)... Unless you stuck your hands in shit or something, I doubt there's enough bacteria there to make you sick